*****ulent contract

I currently have an ongoing dispute with Cellc and I have been handed over to Nu Debt solutions. They keep calling me and I have advised them several times a *****ulent contract was done on my name. Their consultants are rude and unhelpful!!! I have asked several times for a supervisor to contact me but nobody returns my call. Now I am receiving sms's that I owe them money for telecommunications. Nu Debt Solutions and their client are full of ****. Their customer service is pathetic.