I got to access the advance server and I'm thankful for it but the problem is I can't recharge using vanguard coins I hope I can recharge because it have an advantage

So who does not now how to recharge in this advance server its in the event you have to find vanguard coin exchange

I feel not good with it,because every time i want to exchange vanguard to diamond it doesn't work.! Recharge shop is not working at all!!!