You should contact lauren@fixya.com
She does not like to deal with these issues but is one of the prime people you need to speak to
Failing that you could try yaniv2fixya.com
The expert name that you spoke to would also be very useful as a warning to others.
There are expert on FixYa who's standarsd and knowledge are very high but as with any crowd sourced site there are also bad apples and I can only suggest that you got one I am afraid.
FixYa is attempting to adress some of these bad apples with the introduction of a more PRO/ELITE system shortly which resides between JustAnswer (a much better site) and yahoo etc.
the new program looks to adress many of the quality issues that are still rife on Fixya so talk to Lauren and I am sure she will help you.