Honda 2 Wheelers India — CBR250R repairing went wrong

Address:

Udaipur, Rajasthan, 313001

My bike's engine died while i was riding.
So I took my bike to lake city honda service center, they took 4 days to understand what the problem was, why the bike wasn't starting.
Then they told me "chain timing tensioner broke down and the valves are leaking".
So they changed the tensioner and got the valves checked up.
And then the bike was starting and running but the body parts weren't tighten up properly, few of the screws and locks were missing, the acceleration was tight, engine was getting hot faster, and the break lever was bent.
When I asked the mechanic if he got training for servicing cbr250r, his reply was "I don't even know ABCD of cbr".
Now what I noticed was wrong was the upper part of the bike, what if he ruined the inner part of the bike as he don't have any experience of repairing cbr250r, he was experimenting on my bike.
I want a trained mechanic to check up my bike and refit it again.
Thank you.