Overbilling and transacting my account without approval - i AM DONE

Terrible Service and Empty Promises. I have been a customer since June and only had some issues with connections - In OCT i paid my service of R499 as like any other month - paying for November as I pay in advanced. on the 2nd of November they Transacted (without my approval) R998 - I have no debit order or transaction arrangement with them and they have never done that - called them and spoke to a Lehlohonolo Monyane on 2nd of november (6 emails sent to him) since he requested proof of all my payments and he has not responded to a single 1. I Opened a Ticket on 10 november (not actioned) instead they got the same guy to acll me and make another promise that he is working on it and will call me. I opened a whatsapp chat on 16th nov and they said i dont have a ticket open - when I provide them the ticket number the operator (Thsepiso) says i should send my invoices again and the person who I sent them to will reply another 6 days later - nothing - I dont want this service anymore and want a full refund - Useless - If im not fighting to correct my address every second month - its my money - I'd rather pay more for less stress - I want this cancelled now and my money refunded