Ok, I had to re read the OP a couple of times (slow comprehension this morning) - I was trying to work out whether the shop had caused the problems, or if they were existing ones the OP knew about but weren't fixed.
Assuming it is the former, then you need to speak with the owner of the shop directly and as immediately after the fact as possible. You expect that your bike will come out of a service/wof etc in appropriate condition (unless an existing fault is pointed out for you to have remedied before returning for the wof to be legally issued). It is not always possible to recognize a problem until after you have arrived back home (hopefully it doesn't spit the dummy on the trip home) but you need to be prompt with any complaint.
Did you take your bike there based on their reputation for previous work, word of mouth, of stab finger randomly at a spot on the yellow pages? Maybe it might be best to stick with reputable service providers even if they are more expensive. I would never do my own work on my bike as I have no suitable knowledge or skill level to attempt such work; but I would also never take my bike to someone who I had heard nothing about or that I didn't know had a long term reliable reputation.
Bookmarks