I buy a lot of tools on ebay, in Oct. I won the auction for a tool.
The seller never sent it or refunded my money. He gave me a lot of
excuses why, finally said he lost it.
I filed a complaint with Square Trade, along with a mediator this
seller agreeded to refund my money, as long as I did not give a
negative feedback. I agreeded. The case was closed (Not by me). He
still has not refunded my money.
I tried to open another complaint with Square Trade, using the old
case number as Ref #. But they have not replyed its been over a week.
I don't want this guy to get away with this, what can I do?

If i were you i would do one of two things. A. if you havent already
got to this website http://pages.ebay.com/help/contact_inline/index.html
and follow the instructions to contact someone from ebay about your
problem. Next I would email the seller and tell him that you WILL
input negative feedback if he declines to contact you any further
about your issue and that you will be contacting ebay. I would also
get in touch with a lawyer and find out if any further action can be
taken (i don't know if you want to take it that far or not but it is
the next logical step) . Ebay should contact you and help you resolve
your problem if they dont , simply give bad feedback in the hopes to
warn other ebayer's