What to do if you're unhappy with a repair
Even in the best workshops there are situations where the result isn't what you expected. The first step is always a talk with the workshop, with the quote and receipt in hand: often it's solved on the spot with a re-check.
If you don't reach a solution, you can file a complaint with the National Authority for Consumer Protection, which oversees the market and can apply penalties. Keep all the job's documents as proof.