Find out who the centre manager is and bring this to their attention, send images of what they have missed, you don’t get charged for an assured report for them to miss items, politely inform them you won’t be buying from them if they can’t refund the car or make payment to rectifying at a Bodyshop?
how many are you buying a week? I didn’t use the auctions for at least 2 years when I started.
get out and view some privates locally and scour Ebay and Gumtree, buying a lemon when you’re starting out can really hamper quick progress