Xbox x - lag/server problems? Solution?

I try to play BF6 at night but its almost impossible.

A lot of some kind of lag. Everyone can kill me in a half second. I cannot win a gunplay. Sometimes need a full magazine to kill someone. 

Today its the worst day. 

I have a cable connection, everything its ok, my router its ok, my ping its between 47/50. 

I will refund the game if i cannot play the game normally.

I hope you will respond.

Thanks.