unsatisfied customer very bad customer care

good day Peter My mechanic bought a complete clutch kit from continental Clutch Dist. cc on the 16/05/2019. as per sample that I have supplied them. When we wanted to install the clutch kit, the pressure plate was 5 mm to thick and did not fit. the customer could not wait and we bought one closer to us. we went back today to return this clutch kit that was not used and still in original box, and buy another kit for a GMC. then we were told they do not do that because we will do it will the new kit as well, when my guy tried to explain to them what the problem was, he chased him out of the shop, with out returning my money nor replacing it with a new clutch kit. I tried to speak to Halema just know, she immediately started yelling, told me the clutch was supplied correctly. and put the phone down in my ear. very very bad expierence..