jet *****s money from customers!

I had went to pay my insurance @ Jet, using my bank card, the person that assisted me told me that it did not go through, so I paid cash for it, all the while it did go through. I did not know this, so I go to my bank (ABSA), cause I realized an additional sum of R880 had been deducted from my account, they had told me that I swiped my card @ Jet Newcastle, and they are unable to just simply do a reversal because the money is under authorization and isnreserved . when I go to jet, they say they have nothing to do with it and have no record of it. This is such disgusting behavior from a well established organization, people work hard for their money, not for it to be stole!!! If Jet is unable to keep track of such errors, they shouldn't be in operation!