<human>: Okay, so my gf used Gumtree.com to buy some Cirque du Soleil tickets as a suprise for me, she met up with the seller and paid £80 in cash in exchange for the tickets. We were super excited and we ended up taking the 1 hour trip to the Royal Albert Hall in London only to find out at the door that our tickets were invalid.

After some questioning, all the ticket office will tell us that the tickets were bought via an "illegal transaction" and that they were invalid. They have seen this before a hundred times and theres nothing they can do. So, we try calling the mobile number of the seller and predictably we get no reply. Obviously being pissed at losing out on £80, more than anything I was pissed that a dick had scammed my gf who was trying to do something nice for me.

SOO, we notice that the scammer is also selling other tickets on Gumtree - my gf creates a novelty email account and emails him asking for availability... and the cheeky b*****d replies saying yes!
Soo, we now have his mobile number and his email address. Going by his previous sale, he would be up for a meet to make the exchange. So what can I do to fuck this guy up/ scam him back/ troll him to death? any ideas? Any scams (other than tearing him a new asshole) can you suggest?

Can you give me the gist of the text in a nutshell?
<bot>: Ticket seller scammed my gf, we have his mobile number and email address pretending to be willing new buyers, he will be willing to meet up, how do we scam him back?