compromised Account/ Fraud?Unauthorized transactions, devices, and payment method

From the first day I had this account I have had nothing but issues with someone having unauthorized access.  i have contacted customer support and the only thing they can say is remove it, but my account is compromised what will do about that. I just setup new service at new address in June and after i picked up my modem I received a notification the next day to finish setup my mobile device and an email with signed agreement. When i contacted support they said they would remove device and i wont be responsible.  First the only thing i signed/left with at the xfinity store was internet modem. 1 month later I go to pay a bill and an unauthorized credit card  is on my account. i cant remove it because it is connected to mobile service i dont have with you.  i had ti contact customer service again ... tell them i never had mobile service, my account is compromised. what they do run my credit only to find out for 100th time i dont qualify to contract a phone, will have to purchase upfront. sorry, miss jones you dont qualify, and then i asked to speak with supervisor because this is too alarming. Fast forward to this morning woke up to notification of unauthorised device connected during the middle of night.  i am single live alone, no female or male friends, only family and my grandkids. I cant remove the device in the app only pause it. logged into my account online only to 12+ unauthorized devices connected to wifi hotspot. i took screenshots of everything but this account is compromised. i know exactly who but i have police reports and have contacted the fbi because even my grandkids devices are compromised. i just dont know what to do anymore they have taken stalking to another level and even tamper/ steal my online delivery orders. i would like it if a supervisor or management contacted me by email or phone about the compromised account.