Brake repair service near Harrisville, RI

Magno auto repair was the WORST place I could EVER have taken my car to. They told me I had so many different things wrong with my vehicle, i had to get a new water pump, 4 sensors, timing belt, etc, in order to get my cadillac cts running in perfect condition. Well, not even a month later my car broke down and now its at a shop where the mechanic has informed me that the service done on my car by Magno's was the cause of my engine almost blowing. Magno's people left wires disconnected, sensors that were switched, they were all in wrong places, they put my engine back together but left screws out and that caused oil to leak all over the engine and brand new parts I had just spent 600$ on. There was also oil leaking from behind the pulleys, which were aparently too small. All that amongs other things, he destroyed my vehicle. After paying so much for a job, I really expected him to do it right, but I am very dissapointed and angry with this experience. My car is currently at another shop, where my vehicle's engine was put completely apart and numerous parts are being changed due to damage caused by him. And Magno will not do anything about it. Also, the receipt he gave my only says "work done for x amount of money" so there isn't much I could do legally. The most dishonest and iresponsible bussiness I've ever came across!