First Xfinity bill not what was in the agreement

Accidentally deleted the other post but I’ll rephrase my concerns. Okay I get that you all charge for first month bill a month in advance now, but the amount you all charge me was over  $80 when I agreed to switch and bundle a deal for $35 dollars a month. So I am confused on why my bill not in or around the amount that was in the deal. I was going for just internet when Xfinity made me aware that if I get Xfinity mobile as well, I would be getting a 45 dollar discount along with $100 Visa card for bringing my own phone. Plus I enrolled in automatic payments so that is another discount added on. I know there is a 10 dollar one time fee but my bill should still not be in the high 80s. I would’ve just stayed with my prior internet service if this was the case because I was getting around the same mbps for less than what this bill is. The main reason I switched was because of the promotions and deal I made. Why am I paying over 2x more than what I signed on for if everything was completed same day? Shouldn’t my monthly bill reflect my agreement?