Telkom very very bad service

My husband was credit listed by Telkom for two sim cards which he never used cause everytime he had to reload the cards with data.He tried numerois times to get it cancelled because the cards was not working but no one at Telkom could help. Every month they debited R1500 and more from his bank account. He then decided to reverse the debit with the result they credit listed him. We only found this out when he approached the bank for a loan. We called them to query and they said if we pay the outstanding amount they will give us a paid up letter and clear his name from credit listing.This promise was never true.We called them every week since 26December and we still waiting for this letter.They are really hampering our financial status and my husbands business as he is being kept back because of Telkom. Really this has been most frustrating for us. Till this day this matter is still not resolved. Very very bad service.