Complain regarding the Account and airtime

Im continuously asked to pay for airtime which I don't even receive because of *********** JET clothing store staff in Polokwane (limpopo mall).since 12 January 2018 I've been struggling to get assistance regarding the cancellation of this airtime which I don't even receive. Last month, on the 22 May 2018, because of their incompetency I resoluted in paying up the account and closing it off, to avoid paying for this airtime. On the process of closing up my account ,I was told that everything was cancelled including the airtime,but to my surprise, on the 13 June, I received statement from JET clothing store.I went to the same store to enquer about that, since, as far as I know I don't have any contract with them.Again I was told it's airtime.guess what? I left the store not satisfied, because of *********** staff.I don't even have answers.