Bad service using defective parts

Joburg Canopy Fitment Centre Newlands, does not give any terms and conditions or offer a guarantee on their service. They install defective third party parts and refuse to refund for these defective parts. This Fitment Centre does not explain payment terms until issuing a receipt. A 2% bank handling fee is charged by them for paying with a credit card which is the first time I have ever seen this. I am still waiting for the owner to contact me. I DEFINITELY WILL NOT USE THEM AGAIN!!!