unnecessary areas and poor service

I requested transfer of ownership which was assisted by a very quick,efficient and highly professional consultant, whom did his utmost best to help me. However when this matter was handed over to cellc the two accounts where consolidated and I am being debited for both even after the transfer was done and I am now in unnecessary areas of more than R600 with nedbank and they still use this old banking details to which I clearly notified cellc of that I am now using FNB. This did not just put me in areas but also effects my credit record. And am hold cellc liable for the payment to nedbank for those areas. I also payed them in cash and they still debit me for the very same payment I made. Not only is the network bad but their service is putrid.