Nedbank C/card

I recently received a credit card statement showing an amount of R114,90 used to purchase fuel at a Shell service station in Ladysmith. I called customer care, they cancelled the card. I noticed on the statement a few days later that the number on the statement is not the same as on the card itself !. So of course I queried that. They said they would send new credit card to the branch.i refused it.. and I will not pay the R114,90 . They then had the cheek to say I paid for the fuel and then to the garage shop.. not true, as it would have been 2 transactions. I would never use a credit card to pay for fuel, and who puts in R114,90 ??? I have never, and will never put that odd amount in as fuel anyway. Also ,I have had their credit card for many years, and not once have they ever offered a lower interest rate for always paying on time, and more than the minimum amount .. They just quick to try to increase the limit on the card .