Account Still not closed

I spoke to Telkom accounts department on the 13th of February to notify them that I was immigrating to the UK. They told me that it would take a full month to take affect, that on the 14th of March the account would be closed and the lines and broad band would be switched off. They said that my final account would be debited on the beginning of March. I agreed this would be OK. I am still receiving invoices which are going up every month as if my account has not been closed. I would have to take a bank loan to try get hold of there call center if I were to phone from the UK. I just want the account closed and the outstanding amounts removed.