Extremely irritated and disappointed cash paying customer for years.

I bought a vehicle an Audi TT from We buy cars Midstream on the 27th January 2024. We bought a platinum rated car which means it's drive and go. Confirmed with Madison the sales consultant if there is anything wrong with car he Confirmed car is all good. Than we asked to test drive car Madison came back with his manager, the manager advised us that he needs to drive as its a sports car. We confirmed that with manager Dwayne if there is anything wrong with car he said car is in perfect condition its ready to go. We took test drive with manager driving and because everything was confirmed by manager we were happy bought car as test drive wasn't available and manager said all good and platinum sticker was on car. Its a cash deal almost half a million we've been supporting we buy car with cash deals for the last two years with business and personal vehicles. We asked for service book was told its in car we paid waited for almost an hour than left. As we were driving home we realized brakes are making a horrible sound but thought it'll go away nothing . I emailed the sales guy as I didn't have his number same day no response . Tried contacting the sunday again no response. Monday we went to we buy Cars Salesman test driven the car and he heard what's happening with car. After waiting over half an hour the floor manager came ,trying to tell us about wear and tear on a car we bought with platinum sticker and Confimation from the manager that nothing is wrong with car,so after we paid so much there's stories. Floor manager than said we need to get quotes from audi and send it to him he'll give it to operations manager. After a day or two I get messages saying I lodged a complaint with we buy cars and I will be contacted I immediately contacted the call centre to ask what's happening and was told I need to wait for assistance and will be contacted within 72 hours, I advised that this complaint is actually coming on since the day I bought car. Today is the 05th I had to call to follow-up and am hearing my query was never escalated after I send all the information that was required. 52673