Not getting promised rate

I called to complain about an unexplained increase in my monthly charge.  The representative told me he could lower my rate by $30 total.  I confirmed this several times - that they were going to change my voice service to a free mobile phone with no service charges. Here is the transcript:

From Agent,

Your internet bill will be around $75 per month with new wireless mobile device on us at no cost per month .

From Agent,

And with taxes and fees it will be $85 per month .

 And this is with auto pay discount and taxes and fees from the goverment,

 No hidden fee over the $85 per month.

From Agent,

Just there will be shipment fee of around $20 for the new devicce today and $10 one time device activation fee that will reflect only in first month bill.

 And this is all the details about this deal.

From Agent,

Now waiting for your approval to make the changes for $85 from $104?

I agreed to this.  But now I cannot find any clear indication of what my monthly charges will be. It actually shows that it will be $101 per month.  Luckily I kept a copy of the entire chat transcript.  But I am afraid this is going to be yet another long fruitless quest to keep Comcast from committing fraud. When I DM'd support here, I was told I was violating forum rules and I needed to get an invitation to communicate with them.  So, here I am.  The last time it took certified letters to the VP and several months to get them to rectify their illegal practices.  I should have known better and just switched ISPs.