Q: Had clutch replaced, after that clutch wouldn't pressurize and while driving and I stalled out and now just clicks when starting

So I had a guy replace my clutch then when my clutch wouldn't pressurize he left me in a shitty situation he was like take your car, and you can't work on it in front of my house (while the car still wasn't 100%) I couldn't get it towed because I was broke which is why I took it to him in the first place. So having no other option I decided to drive it without using the clutch and I was slowly driving down the road in first approaching a red light when my shifting linkage slipped off making me unable to pop it in neutral or do anything I had to stop (red light) and stalled out the car was still in first gear so I couldn't push it out of traffic so I popped the hood found the linkage off put it back on and was able to finally pop it into neutral and push it out of traffic. When I try to start my car it just clunks, it's not turning over I tried turning the crankshaft (sparkplugs pulled) and it won't turn... Is the engine definitely seized or could it be some thing else?

My car has 210000 miles.
My car has a manual transmission.