Left the following negative feedback:-

Didn't answer any emails after sale.Re-sold the item I won for more money.BEWARE

Our Response:-

We sent an invoice, still have your item (+ more), waiting patiently for payment

What we would like to have said:-
We did send you an invoice. We do also have an "about us" link on every ebay item we sell, including your transaction. This includes full information about who we are, and how to pay us. We do also mention that our e-mail inbox gets flooded with over 1,000 emails per day, so we don't always get time to respond quickly.
Nothing stops you from using the post or telephone to contact us.
We did not re-sell "your" item, we resell a similar item every week. We think as we bought over 2,000 of these sets from the producers, we are entitled to sell more than one of them.
Ebay's feedback forum gives the following warning to you when you attempt to place negative feedback:-

Important:
You are about to leave a negative or neutral comment about another user in a public forum. Please consider the following before confirming your feedback:

1. Mail delivery can take up to two weeks; international trades and some shipping options can take longer. Most sellers wait 7-10 days for checks to clear.
2. Have you called your trading partner? Requestcontact information.
3. Negative feedback remarks cannot be retracted. If you must leave a negative comment, please keep your comments factual and avoid personal remarks, for example, "No reply to emails and payment never received."

Note:
It is important that you attempt to resolve any disputes prior to leaving negative feedback. You should only leave negative feedback after you have tried all other methods for successfully completing the transaction.