The text in your post with all the misspelling suggests English isn’t your first language, but that’s perfectly fine too. We don’t berate people for that. We answer people who have genuine questions about travel to Thailand and visa requirements.
If you know the answers then please advise. If you’re pissed off that the same type of question is asked everyday then just scroll on.
DTV is a multiple entry visa valid for 5 years. You don’t need a re-entry permit to leave and return. It’s built in to the visa. Every entry grants you 180 days.
France uses the evisa system. Fees are payable on application. If rejected there would be no refund.
Almost certainly you’d need to pay the Muay Thai place upfront. Although that’s probably specific to each embassy and I couldn’t advise what Paris requires.
Paris is well known to take a long time to process a visa. Like a month or so.
If you are not close to the airport where you entered you could try going to your local immigration office to see if they will correct the stamp for you. If not you’ll have to travel back to that airport and have them fix the stamp.