I can sympathize with this one. Nothing to do with computers or ISP - just old folks who need some help.
When I moved to MD in the early nineties I couldn't understand why my very elderly parents' monthly phone bill was so high. Particularly after my very tightfisted mother was boasting she had signed up for the special, el cheapo plan of only 35 or so calls allowed per month, instead of the usual unlimited local calling that most everybody had back in the day. This was not long after they moved from Leisure World in Montgomery County to here on the Eastern shore.
Well, lo and behold, after I got a look at a bill for 1st time turns out they were still paying "rental" charges for their old-fashioned (non-wireless) telephones! Apparently they didn't understand the notice (back in the '70s, wasn't it ?) Or just ignored it when the phone companies were required to tell customers they could just pay like $10 or $15 and be done with the monthly rental equipment fees.
Yikes. All those years of paying bull**** charges they didn't have to. I don't know who I was more ticked with. The phone co. for ripping seniors this way, or my folks for slipping in their old age.