Absolute Autobody

I brought in my 1999 Pontiac Grand Am for service because it was overheating. Upon inspection, Absolute Autobody diagnosed my problem as being a faulty intake gasket, and water pump.
The cost to replace those 2 parts was around $ 1100. After a week or so, they had finished the work on my car, but when I went to pick it up, the check engine light came on.
I immediately pulled it back into the service center. Upon inspection, they informed me that the check engine light was a result of a misfire in one of the cylinders, and that it was nothing to worry about.
The very next day, my engine overheated in the same way that it had before I ever took it to them. I made them pay to have my car towed back to their shop for further repair.
After another week went by, I was told that the current overheating was a result of a blown head gasket, and since that was «not part of the original problem» with the car, that it would «not be covered by the warranty» on their original repair, and they wanted another $ 750 to finish the repair on the head gasket.
After the car sat in their shop for 8 months, while I tried to figure out how I could take them to court over the matter, they decided they would start billing me for storage fees on the vehicle.
Needless to say, I immediately had the car towed out of there (at my own expense, PLUS reimbursed them for the tow fee they paid when it first broke down again).
Upon inspection by another auto mechanic, I was informed that the only problem, all along, was that my radiator did not work, but that now the head gasket was indeed blown (a result thereof) and that I would need an entirely new engine.
The cost to replace the entire engine was only $ 1100; the same amount I spent on replacing only the original two parts at Absolute Autobody. The bad news for them (and for me as the case may be) is, had they properly diagnosed my broken radiator in the first place, the cost to repair my vehicle would have only been $ 180 (which is what I paid the second mechanic to replace my radiator after he had replaced my entire engine).
As a result of this catastrophic customer service experience, I would like Absolute Autobody to immediately refund the entirety of my original $ 1100 for the faulty diagnosis of the actual problem with my engine, plus reimburse me for the 8 months worth of rental car fees I endured as a result of their faulty diagnosis causing my vehicle to be out of service during that time.
In addition, I expect to be refunded for both the original tow bill I paid to have it towed back to them after it broke down the day after I picked it up from them, and the tow bill I paid to have it towed back from them once they threatened to start charging me storage fees.