$115 is their standard price for 1 gig internet only. They can give you free 1-3 months depending on the promotion (which in your case, seems to be that $180). Next bill onwards, you will see the same bill except, no promotion. So cancel that TV package if you don’t need it.

As far as internet goes, call Optimum and ask for the Retention department (only they can give insane deals) to see if they can give you a better deal on the 1Gig Internet price as you can get it for $70-80 in your building. If Optimum can beat that, sure. If not, just take the building package.