Aliexpress welcome deal

I've been trying to exploit the aliexpress welcome deal and got as far as logging in going to checkout, but after i set shipping info the page refreshes and the products price goes up, i dont understand what could be casuing AliExpress to detect the exploit, i used vpn, cleared my cookies, made an atomic email fake name and everything but it has to do something with the country because the vpn server that im using is located far away from the country im in. Could anyone help thanks!