I did a change of contract ownership in July, paid R190 in August, R178 in September, and now in October R415

I did a change of contract ownership in July, paid R190 in August, R178 in September, and now in October R415. I am supposed to be on a R159 month to month contract. The MTN statements reflect that I am not paying, yet the money leaves my account. Absolutely ********! I will be canceling my business with MTN if the matter doesn't get rectified soonest.