Banking details incorrectly captured

Sometime in October 2014 I went to telkom mobile outlet I'm Cresta to apply for a contract. I filled in the forms and submitted my bank statement as well, mid November when I received the statement via email I contacted the call centre and was told to do manual payment. End of December they didn't debit my account when I phoned them I was told that they incorrect banking details under my name and my line was suspended, paid the account on the 28 Jan 2015 and line reinstated. My frustration is that I am getting calls daily from telkom ' s debt collectors harassing me and telling me that I will that extra costs will be billed to me because I am irresponsible. I have dealt with lots of people trying to resolve this matter one of them is Sbongile Stalmeester case number ***2. This is affecting my credit record and I am not happy at all someone must be accountable for this mess and I don't want to speak to call centre people anymore but would like to speak to the senior managers to resolve this matter and I aldo want a written apology. Regards Mooketsa