If she did the order herself on line , then it ( obviously ) can’t be mis-sold, no one sold it to her , however there is a cooling off period, so if it were not that long ago the option to cancel may exist, if it were too long ago to do that , then there’s not much that can be done .
If it’s £70 a month , then presumably much more than just low speed broadband that’s been ordered , if it’s inappropriate what’s been ordered , but no sales person involved, it’s hard to argue any impropriety.
£70 would be lot just for a low speed broadband connection ( BT charge around £30 for 50 Mb broadband ) but if you add ( for example ) a telephone service with unlimited calls , WiFi extenders , unbreakable WiFi ( 4g back up ) etc, etc , then it’s not an unreasonable sum , obviously it can still be inappropriate for her needs though , but was self selected.
