refund

im so furious and frustrated by Kia fountains ,my car had underwent repairs by them and i realized that i overpaid them with R25000 and immediately after receiving proof of payment i contact the manager by the name of Mark Oosthuysen whom advised that i send him the proof of payment on 29/08/2018 and responded on 30/08/2018 at 12.38 saying he handed the proof to his accounting department and someone from that department will give a call and on Friday the 31/08/2018 i decided to go see what is the held up with my refund ,i fount Mark and asked him how long does it take to initiate the refund and why am i not getting any communication from either his department nor him,shoo to my surprised he fumed at me saying his not wrong and im the one that did the error so im must not come and blame him they will come back to me when ever he doesn't know when it might take 10 days .i told him i want my refund because i have to pay my bills and if it was me owing them they would have already added cost of storage and now because its me he act so rude with lack of respect .i don't understand why a hold up its my money i want it Kia please pay my money