WIBTA, So my roommate recently got an $82 bill for internet I never used. When I moved in I set up my own router and modem. I cut the bill from $82 to $55 dollars and had to set up new internet because she was being uncooperative. She claimed that she didnt know who the internet was registered under, even though she was paying for it. 

So I told her to call comcast and send back the router when I set up my internet. She said she would and a few days later I texted her about it. She again said shed do it. 

Today she got a charge for $82 from comcast and is saying we (me and the other roommates) must help her pay for the internet. I sent her a screenshot of me telling her to send back the router and I have not yet flat out refused but I sure as fuck am not paying. AITA?

Background, she is 27 and partially owns her own company. She always complains about how hard she works and never has time to do anything. This all happened during my week away from the oil patch. I work 120-168 hours per week. I was bombarded with messages. 

Lastly she does occasionally watch my dog but really my other roommate does that. 