Shocking service

I have been trying now for almost 3 years to close an account and resolve a ***** case with Edgars. In spite of the many phone calls and emails I have yet to resolve this issue. My account has been handed over to at least 4 different debt collecting companies and I am called and harassed literally every single day of my life. I have absolutely no clue what to do to resolve this issue. I have sent the necessary paper work with affidavit and proof of signature and still nothing.