How long should it take a shop to put in a used motor??

What is your question?

Took my car to a new shop near by because it was over heating.They said their was a broken head glass.Somehow they said the car wouldn't start at all on them after I had taken it in.They gave me 2 options.1 to sell the car / junk it. 2 to put a new motor.So I went with the new motor.Told me to give them $1000 to start on it cause they where gunna look for one,and so i did.Took them 2-3 weeks to get one.Called them multiple times and they said that it was gunna be done by next week.Its been almost 3 months without my car.Untop of that I took it in runing,just wanted them to check it out cause it had just started trying to over heat and I was concerned.And now it dosent even turn on.Thats why I'm asking if something normal or am I just over reacting.