Dab service with ***** activities

Sunday the 13/Oct,I received 3sms notifications from Mr price to confirm purchase with yes/No. I rep**** with No, However the next day Monday I went to Mr price store in Killarney mall to cancel the mobile airtime contract since I had fully off paid the account and to get clarity of the SMS I received. I was advised that they cannot proceed with my canceltion request as the account is in arrears and I was also advised that the was purchases made on the 13/10 in Durban(Manzimtoti) which I do not know of. All these sale/purchase were done in other province yet I`m in Gauteng with my actual card in my hand. Please be advised that I not involved and do not know of any sales made on my side.

Kindly advise how can such amount of sale be made with no verification yet when I personally make purchase in store they will verify by asking for my ID confirmation. Also did they take any consideration of the daily limit to use all the credit amount available. When you call their client services to cancel the acc since its paid off, I was put on hold for 2:30. Please assist before any *****ulent activity again