Problem buying ZP

So here's the deal, I want to buy 125,000 ZP for a gun, but every time I try to buy ZP it tells me that my order has been voided because it failed to pass security validations. I triple checked all the info every time I tried and yet it still tells me this. I tried different amounts of ZP and it still gave me that error. Someone on the forum wrote to try the paybycash method and you can choose credit/debit card there, I tried that, but... it told me that I can't buy it from there because I live in Illinois. Some help would be greatly appreciated, I sent in a ticket, but I don't want to wait long for a response from z8.