presume you have another way in to the house or are you locked out ?
Are you in The "Roches" near Chatelus Malveleux ? If so I should be able to pop over to take a look sometime if you haven't been already fixed up. I'm not a locksmith but have 30 years in the building trade including fitting locks & happy to help.
Sorry the weekend is out now but next week is ok , so if you don't get sorted let me know.