I forgot to pay my ISP

I was reading a post on a different forum about a new deal on fiber and then it hit me,. I couldn't remember the last time I paid my ISP.. I logged into my account. 6 freaking months , LOL So I got slammed with a 660 dollar bill 😛 I need to stay on top of stuff like this. One time my utility company didn't bill me for over a year.. They made me pay 800 a month until it was paid off...