poor service and lack of knowledge

I went to the mega city shop to check if my account was up to date and to ask them to terminate my contract when it ends. Thato told me my account was up to date and was overpaid by R44.00. She also told me that I will be credited with 44.00 airtime,she didn't know how to explain my account. After a few days I received an sms reminding me of the outstanding amounts to be paid by month end. Their service is very poor and they clearly need training.