Pay for extra internet?

[Matthew]

My dad just came into my room and told me we can't use anymore internet because apparently the people in the area I love only get a certain amount of internet, something like 300 gigabytes, and if you go over that you have to pay extra for the internet! I think he might've misheard whoever told him this or is just lying because he thinks I get on the internet too much, but do some places give you internet allowance and make you pay extra if you go over it?