Settled Balance/Closure of account

I had been contacted via sms stating that I qualified for a 50% discount on my outstanding balance with MiX Telematics. Payment has been made to the collections agency SCS who has provided me with a paid up letter. I have been contacting your billing department to assistance with updating your systems and closing the account permanently however I keep being referred to other companies (Legal) without any joy. I was told by your agents that payment still needs to be made by SCS to MiXTelematics. When payment was made by SCS to your company and when I phoned in for assistance or an update I had still been given the run around. Please can this issue be resolved asap. It also takes forever to get through to anyone .