Msure RMI mechanics are they reliable?

Been having the worse experience every when it came to a mechanical repair, I bought my vehicle in May and the engine needed repairs, my claim was approved for 15k and I first requested them to send me the list of RMI mechanics that is on their system. To my regret I've opted for the mechanic close to my house and my car has been back and forth to this unreliable RMI approved mechanic on there list 3times and instead of seeing that he completed the job correctly instead they do other fault findings thats irrelevant to the initial repair. Ive been without a car for almost two months and I'm still waiting for an accessor to be sent back to their mechanic to assess the repair work. I am so disappointed in the workmanship of there listed mechanic I ended up going too.