Vodacom TO CLEAR MY NAME

Settled and closed my contract on in 2022. Till this day I have been requesting a paid up letter and my name to be cleared. I still have not received that instead I received an email stating that I owe this contract. I do not understand how because I have not used that number ever since. Can someone who can speak call me because it seems impossible to speak to anyone at your call center. THIS MUST BE FIXED ASAP