I would highly suggest removing the negative feedback that you left for sweatybrain. Just a suggestion before some removes it for you and isn't so nice about it 
You did read the box you checked where it said "I certify that all of the information I have entered here is correct and complete". You know that you certified that you were the seller and sweatbrain was the buyer. If no transaction took place that that is false.
As per the B&S forum rules: "Please be sure to follow these simple rules. Any abuse of the system may result in your privileges to use Styleforum to be revoked, and/or a fine of no less than $500 USD."