Order Not Confirmed

I upgraded my service online today accepting the new offer for 1 year free of Xfinity Mobile with unlimited data. I kept all of my existing services the same. When I was at the end of the order and clicked Submit Order, I received an Error 404 message, cookie too large, or something to that effect. I closed my browser, restarted to the order page again, which seemed was saved, went through to the end, and placed. This time saw 2 black bars flash at the top cookie settings, then returned to an Xfinity page. Not sure which one, but was not an order confirmation page.

I called and spoke to an agent to confirm, but said did not see an order? Said can place again. I said no no no I will go back online and check or do again myself. But now when I go to place an order it shows my current plan as the one selected with free mobile unlimited line for a year. I went to Xfinity Mobile page for account and seems that I have an active plan. Question is, how do I setup the mobile service? And why no order email confirmation?