Constant disconnection in Ultimate Team

I cant play the UT game mode at all. I keep disconnecting from the game before being shown different error message depending on which screen I am at. I cant start a rivals game, disconnecting after lineups are shown. I cant claim objective rewards, gets disconnected. I cant open packs, gets disconnected. 

I have tried uninstalling game as well as ea app, removing all files and installing again. after a few games, I face the issue again. I have tried everything including every tips mentioned in the official ea connection guides, feeling really helpless. Please help