Financial services not helping

I have visited Woolworths at Carletonville Mall and payed my account on the 3rd of December 2015. I also bought some stuff and when I wanted to pay I told the teller that I would pay the difference in (difference between available and total amount of stuff bought). What he did I don't know, but he suspended my card and I had to pay the difference amount in on my Woolworths account as a payment. Basically I did two payments: monthly instalment and the difference of my balance available and total amount bought. Now I receive a sms stating that I did not pay my account. Financial department told me to go back to the store and see the manager so that he can check the journal. I feel that it is not fair that I have to drive all the way back and waste my time for them to sort out their mistake, since I did pay my account. It is their responsibility to fix it! I checked at the bank and Woolworths received my payments. I also have the slips proving my payment! After standing there for more than half an hour on the 2015/12/03 waiting for them to fix whatever they did at the till, now I must go back and stand in Woolworths again so that they can find my payment! This is unacceptable really!