Lying to my 50 year old mother

I want to know who I can speak to about swindling my mother out of 500 dollars. She was lied to about what this internet service would provide her. She was asked how many people she lived with and what she uses the internet for. To which She said that she’s lives with her sister and her sister’s husband and that she likes to stream movies And play games on her phone. And She was told yes that 30 gig was enough. After 500 dollars 5 months of trouble shooting only to be told that her connection is fine but was never once told that she didn’t have nearly enough data to use the internet the way she wants. I have to come 1700 miles across the country to call customer service and figure out in 2 phone calls that she’s paying 100 dollars for enough data to lasts her 3 days out of the month and if she wants to cancel she has to pay 370 more dollars. Even is she got the max data plan and all your tokens and payed and extra 125 on top of the 100 dollars she’s already paying it still wouldn’t be enough to get her through even a third of the month. But yet she was told 30 gigs was fine. In what world is it OK to take advantage of someone like this?