Hello, What you are going to have to do is make a claim against the hotel. Send them a registered (with signed acknowlegement of receipt - in French " lettre recomandée avec accusé de réception) with your account of the facts, copies of all your expensenses, and a list of your claims. It will not be easy and it can become a very long legal battle. According to what you wrote, it appears that you have a case, if you have evidence. However, I have not seen any of your evidence so I can not say if you have a good case. If the matter is not settled out of court, then you will have to take the matter before a French judge. There will not be a jury trial in France. A French jugde will base his/her decision on your evidence. Depending on the amount you will be seeking, you may need a lawyer.
Evidence can be witness statements, pertinent documents, pictures, videos, receipts, bills, proof of payment, medical statements, etc (list non exhaustive).
You will especially need to prove that the hotel was at fault.
Evidence is very hard to collect and provide to the court in civil court matters. For example, the ; hotel workers may not be willing to write out a witness statement. They may fear being laid off. In French law, no one can not be forced to be a witness.
A French judge could order more information (even an investigation) which could mean forcing the hotel workers to appear in court to answer questions. However this is very rare in French civil cases. The hotel can even withhold information and obstruct justice. The burden of proof is on the plaintiff not the defendant.
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