Mobilesplus is a ***** unauthorized company preying on innocent people

So apparently this ***** company has been charging me for 6 years for a service attached to a phone I do not have. After all the phone calls made to them they cannot provide me with any proof of me agreeing to this services, and the refund they want to give me is 6months only. They are clearly *****ing from innocent people and this is not right at all. I would like for someone to give me their work address cause clearly they are not a legit company.