Billing customer service how do I contact people president or resolve today

Good morning. I am beyond disgusted with your customer service and how you are choosing to handle my account that I'm owed over 2100 dollars and I'm going on 8 months of waiting for this to be resolved with multiple ecm tickets created to resolve this yet still nothing I'm at a point where i want my money due to me in a check i can pick up locally and or i need to look into filling a lawsuit being it's over 2000 dollars and the original 1800 credit for me paying for security services for over a year that I never even hooked up and or used which was verified when I moved out of my residence and also after that credit never applied over a year and half ago,  I was still being charged for another almost year for an address that I didn't live at and now has affected my credit report and need this also figured out. The following 325 credit was supposed to go to my mobile for being overcharged for a plan I never changed too and it went to the old wrong account I don't live at and hadn't. Every month on the 1st my payment goes directly to you I'm end stage heart failure and was a platinum member yet I'm still having to call every month in to have you guys turn on my phone after you have disconnected it and I'm now beyond patiently waiting and am needing resolve today. Not tomorrow today!! Over 2000 dollars you guys owe me and I want services at my new place yet I was told by your own employee to go somewhere else especially because of this issue that isn't resolved yet and it's going on 2 years. I shouldn't have to stress about anything being my health is not good yet every month waiting patiently and not being able to get anywhere after going into the stores calling getting no answers on resolution time frame etc I'm at my wits end!  Please contact me ASAP