HWID Ban in one day, on 3 accounts?

Hello,

I got HWID banned by the end of February on all the 3 accounts I used on my PC. The accounts were ranging from 7 years (this account, which is my main also played on PS4) to 2 years. All accounts are 1.3-1.5 KDA (both career and including the last season I played), and I only could get them to diamond elo, tops. And of course, no 20 kill or 4k badges in battleroyale on any of them.

Whatever triggered the EAC, it counted as a repeated offense since I was playing on 3 accounts, simultenously, everyday. By the way, I can play other EAC games like arc raiders and the finals without any problems, on the same Steam account which is attached to this EA account. So it maybe Respawn's own anticheat system instead of EAC? 

I have contacted the support several times, tried to explain this situation but the replies I got from them were all automated. 

Could someone manually check my situation and tell me what is going on?

Thanks in advance.