Bad service

I am receiving bad service from Ackermans. I pay my account each month and it's up to date. On the 25 October I paid my installment and checked my receipt and saw it was inaccurate. I informed one of the cashiers that I made payment on my account but it shows an increase on my balance, she said she will put me through to head office but there was no answer. I asked them to forward me a statement they eventually did but took them two weeks to forward it. The only thing that is extra on my account is a cellphone insurance which is R50 per month. I think this is day light *******. In the past I had an account at Edgards and Sportscence and never had this issue I had no problems with my accounts. I don't know what is happening at head office.

Please rectify this matter as urgent.