bad service

someone opened a cell phone account using my details, how I do not know, I was requested to make an affidavit and submitted it, every time I enquire what is happening I am sent from pillar to post, in the mean time debit orders of this particular contract is been debited from my account. first of all before processing a contract do you not require my signature as not one can provide me with the mandate or contract of this contract taken out without my knowledge meanwhile the devise and contract benefits is being used by someone else. client information confidentiality has currently been bridged and I want someone to answer to this nonsense. before I go to the consumer ombudsman