Transmission replace and install

I bought a used tranny from this shop and mannnn! First I should have trusted instincts when I walked in and this place was filthy. But the old saying you get the service you pay for is in this case another case and point. I bought the tranny on a Friday and brought my car in on Monday for the install of the used tranny. The shop was very poor in communicating a time for completion of the job after being repeatedly asked when would the work be finished. This also a sign of things to come. Finally after asking everyday since dropping car off Monday morning at 8 a.m. a person called and told me that the work would be finished Thursday afternoon sometime and that they would call me. Right.... So I call Thursday around 3 p.m. and the saleslady said she will have to call me back to see what time (he) would be finished. So approx. 3:30p.m. the saleslady calls back and say timidly he should be done some time today. I then asked what time they close for business.. She said 5p.m. I said o.k. I'll be there by 5 then. When I got there at approx..4:45p.m. I was told by the saleslady that (he) was finishing up and asked me to finish paying for the labor.. Not thinking(because I'm not a crook and am a man of my word) anything of it and happy to getting my car back(finally) I pull out CC and happily make payment.. After transaction the saleslady says "I'm just going to get your keys". Right! Hook line and sinker... After a few minutes of her(saleslady) walking away she came back and began randomly speaking to other employees that the car was not finished as expected because (he) it got backed up. He still needs more time and that I needed to comeback sometime tomorrow... Really after payment! Needless to say they not even worth getting upset about... Just sad to see people treat paying customers so nonchalant. I believe they believe they accomplished something being that way to me and they did... To never do or recommend anyonelse in the direction of this classless repair