day light *******

I signed a 24 month contract with cell c,after my 24 month like I said I'm my 1st complaint was still billed for so 7 month receiving no air time,no data,I phoned them they say I must pay them R500 to end my contract and like I told them I was in there store in somerset last year to end this contract they didn't help me at all I told them that I did not even used the sim card never, after the 1st complaint the customer care rep.phoned me we argued I stated my question to him,would you like it if I take your hard earned money for 7 month not giving you any air time or data I give you nothing would you like it,I said no,he phones last week monday he said he will get back to me crediting my money back into my account,its a week today I'm still waiting for a phone call,so to me this is a company that advertises amazingly but customer service in store and from customer care there none but they will take your money make no mistake.all I want Peter is my money back,they didn't give any service accept bad service but my money was good please help.I deal with customers myself.