Line Suspended after numerous billing queries and still debiting account

I have no more words after 4 months of querying two debit orders that went off my account twice. Querying the same issue . I told telkom to cancel my debit order which they did not. Queried again and again then they suspended my account and are still billing me each Month for a phone that is not being used. Who is using those minutes and data. They have never come back to me with feedback of any query I opened and suddenly it will appear on my profile the the case has been closed. All I want is to cancel the contract. I will be seeking legal advise on telkom.