Hi Jean881,
hope that you are in good health ! I was just reading your post and thought that i would just let you know what i would do if i was in your shoes,firstly i would contact the Tunisian embassy -29 PRINCESS GATE LONDON SW7 1QG (0207-584-8117, i must admit they really are a waste of space but you may be really lucky and speak to someone who really may be able to help you.
Secondly i would contact Mr Malek Reijiba Tunisian advocat in Tunisia who speaks english and im sure that he will help you
rejibamalek@yahoo.fr , please do not hesitate to pm me and i will try and find something out for you tomorrow, but if you could email this guy then thats a start. Good luck and i hope that i send you on the right track.