Accidentally bought Game Key for PC?

I accidentally have a PC instead of an Xbox key for COD Modern Warfare

Bought. G2A does not give back.

Does anyone have any idea where I could sell this?

Not very serious, but exchange or sell ebay / shpock and then get something new.

I don't know anything about the sale, but you could at least write to support. I bought a Rimworld Key and it was terminated by Steam and removed from the library after a few months, wrote to G2A support and after 2 days there were 30 euro in my PayPal account.

On eBay or directly on G2A.