ADT not paying my full installment back!

ADT deducted an installation fee of R3414.24. from my account. However, there was a problem with the sales and we had decided to cancel our account with ADT, ADT then had to deposit the money back into my account.<br> They only deposited R3017.24 back into my account, with an outstanding balance of R397.00. <br> <br> I contacted the credit controller and technical manager Isaac who had been assisting me and had not received a response. It has been three weeks, no response to my emails, and my calls are not answered. This all took place after I had a terrible problem with sales and technician that led me to cancel my contract with them, this is unacceptable and I expect my account to be debited with my outstanding Balance Soon, Im tired of waiting!!!!