cancelled home line

I cancelled my home line on 13th December 14 at tygervalley the lady who assisted me said it will be cancelled by the 13th of January 15. On the 30th January 15 my account was debit R500 on an line that i wasnt using. I called the call centre and was told the cancellation was never processed and they will back track the bill and refund me. The lady at the call centre told me they will contact me for my details for the refund till today i never received any call from Telkom. On 30th February 15 my account was debited again for R500 and at this point i felt telkom is *****ing from me cause i cancelled the line and they still take my money. I went back to tygervalley branch to query this then the lady who assisted me tells me they dont do cancellation at this branch i told her its impossible because i was assisted by the lady who was sitting there behind the counter so when they checked on the system she said the cancellation was done but she cant she why they still debit my account. She told me she can see my account is debited but the number on the account is not my landline and she cant trace it she needs to sent it to head office. Can someone sort out this messed and refund me.