harassment and angry consultants screaming in my ear

i had a game account back in 2018 or 2019. the account was paid up in full in mid 2019. i have requested game many times o close the account yet i was sent from pillar to post. in 2020, i kept getting calls that the account had an outstanding baance.i asked game to check their records because the account was paid in full and i asked them to close the account over the phone. all i got was "e will investigate". everyday i would calls from different consultants telling me to pay my account. i was then handed over and was requested to send a confirmation of payment to them. i did that twice already. this morning 2021/04/10 at 8:15am, a very angry consultant calls me screaming in my ear that i should send the letter sowing that the account was paid for. i tried explaining, yet she kept screaming at me to keep quiet. imagine being woken up at 8am on a Saturday for someone to shouting at you. i just wanted o tell her that i had sent the document and i will send it again but i was told to shut up. i dropped the call while she was speaking. i sent that document again and i want a manager to call me. the only call i want, is from a manager and telling me they have closed that account. i cant be fighting for 2years for the account to be close