Ackermans incompetence...

I went into the store in shinbone in lephalale I tried to purchase some stuff for my boy only to find out I had the secondary card i made for my fiance not the 1 with my signature as the main account holder so I was denied cause the signatures didn't match. I tried to explain that I made a mistake didn't realise I took her card and the called the store manager who told me I can't have stuff unless I bring my fiance to sign and I made it clear to him that is highly impossible as she is far away from the store,he told me the only solution is to cancel the transaction and keep the card cause is not mine. I was also surprised wen I was told the card is blocked after the purchase went through n the last payment I used the same card. I left the store with the agreement that the transaction is reversed but now I'm recieving the sms notification of amount due for November while the account is paid up previously. Today I went into the store in giyani where I found out the is balance of R379.46 from shongoane store where I left the store without the goods and the card and we called the customer service and explained everything to the guy who insisted I shud go back to the shongoane to sort out the matter. I find ackermans as the worst with customer service n store with bunch of *********** idiots. All I'm asking is the clearance of the balance in the account cause I'm not going to pay for what I didn't buy and that will be the end between me & ackermans.