Auction Nation bad for business

We purchased over 15 vehicles from Auction Nation in the last 2 years and never had any problems or complaints, besides some small delays. The last vehicle we purchased was marked as (accident vehicle) had ( front smash) but shortly after getting to work on it we discovered that the engine had parts missing on the inside. No timing chain, little to none bolts inside, no head gasket ect.. Looks like someone just threw the engine together and made it look complete for auction. And don't let me mention the funny noise coming from the the gearbox. probably that too was tampered with. I totally understand the concept of purchasing auction vehicles and that it's AS IS however no where was it mentioned that vehicle was previously repaired and returned based on poor workmanship as we've bought many of those as well in the past. If the vehicle's engine was damaged due to the accident then id accept it but the fact that someone first had the opportunity to tamper with the vehicle before it got sold is unfair towards the client. I think that because we bought the vehicle based on it being accident damaged and not previously repaired and accident damaged isfalse advertising. I'd appreciate it if someone from Auction Nation can make contact with us and explain to us how they could allow a car like that on their floor and risk losing future business.