Frustrating being asked to do the work for someone mistake

I was charged R1145.00 for a R145 meal at this wimpy.. the waitress was good enough to bring it to my attention.. the manager ensured me they will put R1000 rand back on my card and this was on Friday.. and said the money will be in your account this afternoon or tomorrow.. so I was okay with it.. only to find out on Saturday the money wasnt there.. after being told by the manager upon going into wimpy on Saturday. That is is my responsibility to find out from the banks why it's not there... I phone fnb and they assured me the money had not come or waiting to come.. going back to wimpy with this information. They were then told by there banks that it will take 7 to 10 working days to get to my account.. I need the money as it's my wife's and mine anniversary and moms birthday.. k asked them to cancel it and please give me the cash.. they insisted that they cant cancel it... it has been frustrating when an restraint makes the mistake and insists you do the work to fix it. I'm not a complainer but it's frustrating that there error has left me financially stricken for such a long period