Card Machine & Bad Attitude

i had recently bought 3 items from your balfour branch. i used my one bank card in their machine and it said it was processing i used another card thinking it was on my side being at fault. after i had then offered to pay in cash it came up onmy phone the 3 sms's from trying 3 times on my 2 cards that it had gone through. i then went to ask and they said no it will reverse and i have to wait. i then went to phone my banks to confirm and get a statement from standard bank & capitec to show nothing has gone through and they can take their products back and give me a refund as im not supporting them any more. i do not appreciate being spoken to by that branch and how they deal with issues, the one lady was rude. and to be honest you have lost me as a valuable customer due to the issue and i will no longer support them. all im saying in other words they need to work on CUSTOMER SERVICE and say if they having issues etc. but it angered me how this went down.