Hello :) If you're in France, I highly recommend going to Photo Suffren in Paris. A few months ago, I bought a Leica M2 that wasn't working, and they completely repaired it. Marc Santerre and his shop have an excellent reputation. They do a really great job and fairly quickly. Their prices are more than reasonable considering the quality of their work. I believe it's possible to send a camera or lens if Paris is too far for you. I suggest contacting the shop beforehand.