Free line of service promotion....Have to read to believe

So originally I had Xfinity Internet and I decided I wanted to add a mobile line to my account. The lady I spoke to told me about this promotion where you got a free line of service for 24 months with the purchase of internet at 400 Mbps or more. I was already an Internet customer so this sounded fantastic. Little did I realize this would be the beginning of hundreds of hours spent on the phone or on the computer chatting and begging and arguing and crying with hundreds of Agents. Every month since I got the phone I start getting billed. At first I thought no big deal I called in and told him what was going on and that was the first time I was told I was a liar that I was full of it that I didn't know what I was talking about that no such promotion ever existed like that and was either hung up on or just transferred to death or until the department closed. Eventually I will get an agent who is able to find the promotion. And when they do they are all apologetic and assure me that they will fix this and it will never happen again but it always does. Currently I am dealing with my third incident where they've gone so far as to suspend my service. Only this time it is gone on for 2 weeks because I cannot find a single agent who will listen to me or take the time to find the promotion. The last guy I talked to was so ignorant and told me the only way I was getting any help was to take [Edited: "Language"] down to the store with some proof in hand, that was the only way I would ever get any help. I even went to the trouble of tracking down the promotion online and I've offered to send the proof to them but every single one support and management together tell me that they don't have email addresses that there's no way for me to do that I mean I have proof but they still will not help me. If I wasn't so poor and this wasn't such a great deal I would have let it go long ago. At this point it's the principle though. Free line of service [Edited: "Language"]! I spend more time talking to Xfinity than I do any other person in my life. There has been no enjoyment or relaxation in my free line, it has been more effort and more work than any lousy monthly bill ever would be. I can't imagine I'm the only one out there who has dealt with this but since I can't get anybody at the company to listen to me maybe this will do something