Not getting download speed I paid for

I upgraded to Gigabit on Monday and now I'm starting to see upload speeds increase but just like before when I had Extreme Blast, I'm still getting speeds at about ~90mbps when they should be up to a gigabit. I've connected my PC directly to the router and it supports gigabit, yet still after a month since I initially had upgraded to Extreme Blast, I see no increase to my download speed.

I've called customer service countless times but none of them have seen any succeeding. I even switched from my old router to an Xfinity router and no change at all. It'd be great to finally get some help.