Adjust billing

On March 27 called Xfinity Service because of intermittent and full loss of service occuring for several days. We talked to Will and he spent awhile doing adjustments all the while talking to us. He stated he found a great offer just for us. We could upgrade from 400 to 500 with 5 year guarantee for $70 with auto PAY and billing. We asked why, he said because we were great loyal customers. So, we thought, why not and he upgraded us. Next day we still had loss of signal, we had a chat with another agent. While she was working, she also offered a great deal. She state, "I see you have the 500 for $70. I can get you the 1,000 for $70. I stated I'd just like to get it working first. I do have a copy of this chat with those statements. I then started getting notices for our next bill to be $95. The offer we had on the phone was not shown. We would not have upgraded without a customer rep for Xfinity saying this to us. So, this need to be changed to what we agreed for. the 500, 5 year, $70 after auto pay and billing. Thank you.  Also, How do I send the copy of this chat to you.