chargeback from an account sale from last summer

i just got an email from paypal today


"Your sender asked his or her bank to reverse the payment for the following
transaction:


Sender’s name: ********************
Sender’s email: [email protected]

We need additional information from you within the next 7 days. Please log
in to your PayPal account and go to the Resolution Center to see the
details of this case. There, you can enter any information regarding this
case that will help us fight the reversal on your behalf. "

i sold an account to this guy on sythe last summer, but i dont have any pictures of the msn conversation or any private messages. i sold it for $110...

i simply don't know what to do.
when i click the resolve button it gives me three options:
1)Provide Shipping Information.
2)I have not shipped the item and I will refund the payment.
3)I have refunded the payment for this transaction.

i have 7 days to clear this up, and i dont have 110 dollars to give up like this. please help

 

A picture is worth a thousand words

 

^This.
Please provide us with an UN-CROPPED image of the Chargeback and all details surrounding this on Paypal (make sure to give us screenshots of the extra information for the transaction).

 

warning: high resolution
http://img833.imageshack.us/i/woah1.png/
http://img194.imageshack.us/i/woah2l.png/
http://img825.imageshack.us/i/woah3.png/

update: i just spent 30 minutes juggling through department transfers on the phone with paypal, they said they are going to conduct a 10 day investigation, and at the end of the 10 days they will notify me whether im out of 110$ or not. i think thats a little bit ridiculous

 

Banned, thanks.