My bill has nearly doubled

Our bill has gone from around 80$ to 130$ in the last 2 months with absolutely no warning. I don’t understand why this happened, if it was a promotional thing expiring it makes no sense to keep our service when we can get the same rates elsewhere. We like having Xfinity but if there’s nothing you can do then I’ll have to look elsewhere. On the forum it said to direct message you guys when countless other people have complained about this so here I am. 130$ for just internet is a joke, if you have anything to help with this I’m all ears.