They dismantled my Mini Cooper engine without my authorization, and even stole parts and replaced with unmatching ones

They dismantled my Mini Cooper engine without my authorization, and even stole parts and replaced with unmatching ones. Also when we didn't agree to proceed with the repairs the didn't assemble the engine because they knew that I would discover the ****** parts. So I towel the car with parts put in buckets and boxes🙆🏼♂️