Vivid Seats Seller Beware - Ripped Off Chicago Illinois

I placed a pair of tickets for sale for a Metallica concert in Houston, TX at the NRG Stadium on 06/11/2017. The tickets sold on 06/09/2017. I uploaded the tickets to VividSeats.com, for the Buyer to download later that evening on 06/09/2017. The transaction had been finalized, and all seemed to be okay. The day of the event (06/11/2017), I received an email at 6:50pm saying,
"We recently notified you that the customer for Order #13991618 experienced a problem when attempting to gain entry to the event. As we have not received sufficient evidence to demonstrate that the customer did in fact receive valid tickets commensurate with their order, we have issued the charge(s) below to cover the expenses incurred in resolving this issue for the customer.

If additional expenses were incurred, the amount below may be greater than your original payment amount of $1000.80.

Total Cost to Resolve: $2001.60

If you have been remitted payment for this order already, the original payment amount may be recouped via PayPal or by charging the card on file.

If payment has not been remitted to you, you are only responsible for the difference of the total cost to resolve the issue listed above and the original payment amount, if applicable."

However, I never received any notification of anything prior to this email. The Buyer should not have had any issues gaining access to the venue, I called NRG Stadium to verify and the tickets were scanned in. Vivid Seats claimed that the Buyer did not have access to the PIT, when they did in fact have access. PIT means standing room only (on the FLOOR in front of the stage), and I specifically listed it is a General Admission ticket, which does not constitute access to any VIP locations or any other locations for that matter. And now Vivid Seats has refunded the Buyer, charged me $1000.80, and allowed the Buyer access to a free show. This is not right, and I will stand for it. I will contact a consumer law attorney if not resolved.

Desired Resolution:

Refund of $1000.80, plus the total of sale that was finalized (minus Vivid Seats fees), which is an additional $1000.80, for a total of $2001.60. I expect $2001.60 back as a resolution.