Hello,
There are some issues with the game right now, so recharging may be offline at the moment. I would advise trying again a little later, preferably after all the recharge events have been fixed (currently several are not working and are giving the wrong or no rewards).
If the issue has not been resolved by later today, you will need to put in a ticket with Customer Support to see what the issue is. Here is the link.

https://support-center.oasgames.com/