**** trusted shop

On the 19 of November I bought groceries at spar Lyttleton.when I got to the till .this cashier tells me my bank card is declining .I was rushing time as it about 16:44 hence I just decided to make transfer and pay . When I got home it appears they charged me R637.88 twice.when I enquired with my bank they confirmed even submitted a screen short .when I call spar I seem to be getting a run around as they ask for my account number .I tried to explain gave them a date a till sleep with the name Josephine matlala.but I was not given a declined slip I I fact was told they throw them away.so I can't claim through my bank making them not pay twice they said they will pay as long as PSA is claiming . When I check my statement a week later transaction is still not appearing. My question is can't they trace using the information I gave to them .I am on the other side scared to provide them with my bank account as already I feel ****med by the trusted shop. But my money nothing till date