billing once accout has been paid off

.game and rcs must stop making money unneccesarry out of us costomers. I paid off my account and the next thing they called me saying I owe the hundred ans something for service fee. Service fee for what becouse that account its not active it was paid off in Aprial. I mean if that the case they must explain to us when we pay off the account. People STOP trying to make money out off us. When we pay off our accounts is becouse we trying to save on those service fees.