want my money back

On the 24th april 2015 I went to ackermans kenilworth to make a payment . I told the cashier I will be paying r250 on my account instead of taking r250 from my debit card she put it as r2500 I was told the store will put my money back into my bank account that has not happend and am still waiting am really upset that is my money that I worked for now I have to wait the bank does not have my money I was at the bank following day they did not receive a reversal from ackermansI have to call that branch to follow up I didn't make the mistake they did its like they doing me a favour I have never seen such bad service from staff and management why must I wait when I have proof my the bank they didn't get a notice reversal don't the staff know how to follow up on these types of things but I guess we as clients are like a bad rash they want to get rid of I want my money and I want it as in the 24th already