Charter Communications Charter Cable and Internet billed for on demand movies I did not purchase Cleburne TX

I opened my eighty year old mother's cable bill to find $190.70 in on demand movie charges. I knew there must be an error. My mother has had charter cable for years, does not order movies. She uses just a few functions on her remote, and would not be able to order an on demand movie if her life depended on it. Not to mention, there were a variety of charges spaced throughout the month and several were adult titles.

I called and was able to confirm with Charter that this was a new pattern for the previous month with no history of charges in the past. Guess what? They said someone in the house ordered the movies on the cable box with the remote and we were responsible for the charges. When I insisted that there was no way that was the case, as my mother had not ordered the movies, they suggested perhaps someone else in the home was ordering them. When I told them she is home bound, and would likely notice a stranger in her house watching porn, they found it humorous, but quickly informed me that it was clearly outlined on our bill that she is responsible for all unauthorized charges. 

I informed them we will dispute the charges and was offered a courtesy credit of $10. I see from other posts that this may be a common problem with Charter. I would be interested to know if there is any sort of class action suit in the works.