ERROR 770 Battlefront 2

This is frustrating I paid money to play a game that wont let me play I cant get in contact with xbox ,I've tried, and I keep getting error codes 770 and 721 at this point i just want my fkkn money back plus the service is already buggy af I have good internet so what's the prob why does the consumer aka the people have to go through unprofessional * like this when we are already paying to play I couldn't even blog my truth till now after 9 tries of putting my same email in that is linked to my gamer account for years over and over until I guess EA said oh aye we do remember you...!!!!!!! And after all that I'm still not helped smh there is not even a hotline to call for support. Logic would tell me if I created a game that I knew was buggy ide at least have a fkkn help line.... main reason why I chose not to invest in anymore battlefront 2 dlc. EA you dont understand my issue if you fkkn did we would be talking...............WTF