increasing bills

i need to know why the bills of Xfinity has increased for these 2 last months ? i was paid $ 35 before but now i am getting bills Of $ 82

oure contract was for amount of #35 per month since june 2024 till June 2026 why it change on June 2026?

I am using this internet just for TV and my kids use on their chromebook for school lesson some times it is too much for one poor family