Hello @dgRDota2
Only Game Masters+ are able to rename. When you put your request for name change, they start investigate your account before a successful renaming. This process may take upto 2-3 days Or more. As mentioned by Felix, name changes are guaranteed on every Saturday. And about your coins, they will be refunded back to when you cancel your request or your request being rejected by staff. I suggest you to wait a little more.
Regards,
PrinceKashyap