please help steam players

i downloaded the game through steam, and after a few fights enjoyed the game, so when i went to purchase some RC it allowed me to purchase through steam... great


THE PROBLEM is that i cant purchase through steam, i can charge my wallet until it cant hold any more money, and go to the rumble fighter purchase page, click "Buy through steam" and then have an Error pop up

E V E R Y S I N G L E T I M E.

please fix immediately or help me to get my rc without spending more money then i already have

 

You should buy through here(site).
https://www.playredfox.com/users/billing?credit_id=1