Not getting service speed I am paying for

I recently changed my plan to gigabit. Its been over a week and I have yet to see any change in my network speed up or down. My question is why and if that can't be anwsered then when can I expect the my internet speeds that I pay for to go into effect. 

Please don't reply telling me to reboot my modem or something like I've seen in other similar threads, I'd like an answer to my question. All of my network equipment is cablable of handling gigabit and regardless even if it wasn't I would notice the jump from 5mbps up to 35.

At this point I feel it would be quicker to cancel my service and then start over with gigabit from the begining rather than switching plans.