Well it depends on what you call help, i am sick of seeing posts from members saying they took their cars to a back street garage with a certain problem the garage then fit several different parts and the problem still exists, it would seem there are a lot of garages around with clueless mechanics willing to spend the customers money as it it was going out of fashion hoping if they throw parts at the car eventually they will magically fix it and when (if) they eventually do fix it they never reimburse the customer for the parts they didn't need, the word cowboys comes to mind.
Now to your case -
I assumed as you didn't say otherwise they put the turbo on you paid and you left thinking the car was fixed and the turbo was the cause of the problem, i don't know any garage that fits an expensive part like a turbo then doesn't charge the customer for the part and labour so it would seem you have found a good one now lets see if they are good enough to fix the original problem.