Bad service

I have been dealing with Ntsudzuluseni Muthewane at MTN regarding my account. I had a debit order for one of my contract and mtn stopped the debit order which brought my account in arrears. Mtn has listed me on ITC and said that I need to bring my account up to date in order for them to update my status. I have paid my account up to date 3 weeks ago and have forward the proof of payment to Ntsudzuleseni as he requested. Till this date I have not receive a response from him.