Somebody left negative feedback on my ebay?

I was going to get this pair of jeans on ebay but for some reason.. My paypal was completelyl at zero. Even right after I sold an 800 dollar circuit breaker. I thought the money was there,.. it was when I last looked.. and then it wasnt there when i tried to pay for the item. I tried contacting this person several times and there was no response. I tried letting them know what was going on with my paypal and a few hours later, i get a negative feedback. Should I retaliate by leaving them a negative feedback as well for poor communication?