*****ing clients monies and ********* behavour

I called the call centre number and spoke to a Lamees cozyn and asked for a settlement amount on my credit card which was given however on the letter emailed to me the wrong account number was quoted.this amount was valid till 12 August which I duly settled yesterday and confirmation received today .there was a balance of R805 still available as I made a payment via debit order and never used my credit card which is now unaccounted for.i receive SMS every time I use my credit card and also have the new available amount si certified settlement amount has been paid in. This is **************** and ********* behaviour on the part of a company that is so well acclaimed.i was not given a losing statement st all nor a breakdown of settlement amount.i want a refund with immediate effect before I go as far as to report this to national credit regulators and the newspapers as this is *****ing consumers monies