thunderbolt I brought a running engine in for a rebuild. I got it back and it would not run

I brought a 454 chevy suburban 1999 in for an engine rebuild. It was running when I brought it in. I got a $6,000 rebuild new block and an engine that would not run. it took 46 days when I brought it in they said 14 days. i took it back for warranty work and 21 days later I stopped by to check on the progress. Steve told me the truck was at the Mechanic's house. what the ? he was visibly shacken seeing me there in person. I aske how much longer. he said the engine was still in the truck! they had not started. so much for service or trust. now I think I will see what other options I have