Bad Service, unnecessary charges!!

I've sent the E-mail on the 14/12/18 to ********** to make the payment arrangements. My account was 1 month in arrears. I honoured the first payment on the 21/12/18 and the final payment to bring the account up-to-date was supposed to be today the 31/01/19. I receive the calls from Foschini every day with R20.00 charges. I need this charges to be adjusted, I'm not liable for them. The PTP was pending there was no need to call, send smses and emails. I've sent the Email yesterday they responded today telling me that's how they work. I need the settlement letter with all the credit adjustments for this unnecessary bank charges. I'm not happy, I want to close my account!!!