I received a permanent ban, support cannot help for more than 2 months

Hello, I am a player from Russia, more than two months ago (at the beginning of January) I began to notice that strange things are happening in my Apex Legend account:

For example, the daily achievements were partially completed, several new unknown people appeared in the lists of friends (Chinese friends ...)) I worked during the day and usually went into the game in the evening and played a couple of hours on average at that moment. At first I thought it was some errors in the synchronization of accounts, because not long before that happened, I linked the Steam account to Origin.

But soon I decided that maybe this was really a hack and I opened an appeal to the Russian EA support service and described the problem in detail in it. Soon I received a permanent ban, a couple of weeks passed, and my request remained in the "processing" status.

Further, I already called support, where they promised me to consider everything and that it was necessary to wait for some time, the technical department is very busy and the waiting time for applications is increased. After another 2 weeks, I made a call again, received about the same information (I will not describe the calls in detail, but in general I did not receive anything informative, but only expect answers in style: " The technical department is very busy, wait some time ..."
In general, I have called there 6 times already (Usually the breaks between calls were about 2-3 weeks).

After 4 calls, not the most friendly consultant said that the "two weeks of consideration" promised on the site did not correspond to reality and get answers same as before...

At the same time, he closed my appeal (# 72656988) and opened a new one (# 75036995), just with the subject "Account and Billing "). In general, then a couple of weeks later there was another call from me, they said that the appeal was under consideration in the technical support service. In general, everything is the same as before... 

Another two weeks passed, there was another call, again promises and offers to wait.
Moreover, after the last call, I did not specifically mention the "case" number, since this supposedly puts you in the queue for consideration, but "supposedly automatically" another repeated application was created, which essentially leads to the same result (according to information from consultants)

In general, the Russian support service cannot help me and has been constantly "feeding with promises" for more than two months.

About hacking.
As I later learned from the Internet: Our "Chinese friends" have the following scheme: they buy or steal databases with account data (unfortunately I was too lazy to bind two-factor authentication at that time, my mistake ...) and then they play "rating matches" from under a stolen account, using cheating programs with friends who do not use them, so that they grow in the rating. That is, it is beneficial for them that the player whose account is hacked does not notice what is happening as long as possible, does not contact support and therefore does not attract additional attention.

Thank you for your attention, I am applying here with hope for help in resolving this situation.

I have never used any third-party software myself. I think that the game should be fair and any attempts to interfere with this (even macros and same things) 

lead to an imbalance and repel the majority of normal players from the game.

PS: So some time ago, I already completely excluded Pubg from the range of games that it is possible to play, because Cheating in this game grew from month to month and it was no longer possible to get at least some excitement and pleasure from a game in which the rules are absolute are not equal for everyone, it is very sad that the developers could not organize a normal anti-cheating system there, and instead only released more and more unnecessary "decorations" for characters and weapons, while ignoring the balance itself ...