If you're like me, you use adblock, vpns, and all the things that mess with online services. The quickest and easiest fix (in my experience) is to use Microsoft Edge/Internet Explorer for the transaction or activation. Chances are you never use it, so you shouldn't have any extensions, cookies, or VPNs to mess with the site. Doing so will save you quite a few steps, and in a return email from a ticket, they did actually suggest that you use Internet Explorer for your transaction.