Checkers Grey Owl and dispute over money they reversed but it doesnt show in my aaccount

On the first of October I went to Checkers Grey Owl to buy a few things, I saw a special on kettles so I took one but when I am at the counter when they ring it up it was far more than the price on the special. They found out that the price tag was at the wrong place. I ask them to take it of my bill as I do not want to pay that amount for a kettle. Someone came take it of but immediately it was put back on my bill. I've paid my stuff but felt that the amount is far more than it should be for the stuff I bought. I checked my slip and they saw that it was back on my bill, the manager came and said she is going to refund me I should just give her the card that I paid with. This is now 4 days later and the R949 rand is still not back in my account. They claim it will take 10 days to show in my account which is unacceptable to me because when I pay with my debit card the money goes of immediately but when they refund you I must wait ten days. My question is how did the item got back on my bill immediately after it was taken of and why did the lady at the till did not say a word about it when I've paid she is suppose to know that the stuff I bought can not cost that much. If I didnt check my slip someone was R949 richer. When you phone Checkers Grey Owl the only response is that they ask their head office and with them it shows the money is succesfully paid back to me. I want to warn people about this specific branch because I spoke to three managers, everytime it is the same answer and when I said I will show them my bank statement the do not tell me to bring it to them and show it to them they just keep on saying its been paid back succesfully. Be aware of that specific branch I've got the feeling all is not how it should be and please check your slips after you paid.....