Okay, have a rather strange situation here...

A long while back, I made a deal with a seller
to buy a cel through payments... well, the sale
fell through and the cel was sold to someone else
(which I don't even really care about)... so there
is "no sale" essentially...

Now, I'd paid about $100 in payments on this 
cel... and I haven't received a refund of that.
I contacted the seller about the matter of a 
refund about 3 or so months ago.  The seller then
told me that a refund had already been made 
(which was not true, I never received a refund).
When I argued this, the seller said he/she (trying
to keep names/gender out of this here in respect
of the seller) would look into it.  I never
heard back.

Since then I've emailed several times - and I
haven't heard back from this person in over 2 
months.  The seller still owes me the $100 (and
some change) I'd put down, but he/she won't
reply to my emails (last one was sent about 2 
weeks ago).  

I know this seller has a good reputation amongst
collectors, and I'm really surprised by the way
this is all going... at this point I really
don't know what to do.  Should I go ahead and
file fraud?  What else can I try?

Confused Lady Z