pathetic customer service!!!!!

I requested a refund for a part that was incorrectly ordered, I ordered a head gasket and was advised they needed to order it, I paid for the part and was advised it would take upto 3 days for the part to be delivered, When the consultant contacted me he had advised me my switch had been delivered, I was confused and told him that I ordered a head gasket and not a switch, so they had ordered the wrong part and needed to order the right part, this further delaying my mechanic to complete his work, the car needed to be completed so I had to source a head gasket from a different outlet, I successfully did this and m mechanic completed his work, upon returning to CMH Honda The Glen to request a refund I was told a 25% handling fee would be charged which didn't sit well with me because the part was incorrectly ordered, after being bul**** I had no choice to accept that they are robbing me blatantly, the refund was processed apparently on Saturday the 5th January when I was there, I was advised the money would be in my account by Tuesday or Wednesday for the latest, its Thursday the 10th January and I am still waiting for my money, the service is pathetic, the consultant is rude, CMH Honda needs to re-evaluate how there staff treat there customers as well as how there processes work,