The only thing you could do is send a support ticket to wild shadow or rather Kabam, go to the forums and on the tabs find the one that says support, send your issue and your email, if you did buy gold they should have record for it.
I bought golds in rotmg using billet and wanted to know where and mail I send proof? help
I sent a picture of the receipt with the game and my email with my name in the game to contact@wildshadow.com is he right?