I need confirmation of my monthly billing

I recently had to upgrade speed and did so by phone. I repeatedly asked the agent to confirm the monthly billing and was told what it would be with discounts. When I mentioned that the email and app weren't aligning with our conversation, I was told that it would take a few days to reflect. I waited a few days and contacted a chat agent who told me that they fixed the issue and my monthly billing would bee what was promised. I instead received a $10 credit, which is nice, but not what was asked considering the monthly billing still has not changed. 

I have the dates of the phone call and chat, along with the chat transcript. I simply wish to have my billing confirmed.