I need serious help to find what plan I actually have now! Please!

I thought I was doing well. My old plan was getting ready to expire so I went into chat and ended up with a plan with xFi Complete, guaranteed rate of $80/year (not taking into account auto bill), free modem, 400mps and unlimited data for 5 years. Got my new modem and all set up. This was about a week or 2 ago. Yesterday, I had a question about billing (due to an email I had received that showed a lower rate). Turns out a $10 month credit for having xfinity mobile had expired June 6 which accounted for the difference. During the course of the chat discussion I was in yesterday, the person I was chatting with told me I could have the same cost, same everything but for 600mps. I asked specifically if it would still be 5 year guaranteed price, no cost modem, xFi Complete etc and was assured it would be so I signed up for it. Got a confusing email yesterday after I switched to the 600mps but it seemed to show Complete, although nothing about 5 year guaranteed things. Today when I went to check my plan, it shows that it's the Fast plan - not xFi complete - and nothing about the 5 year stuff. 

I'm taking this route because I went through a mess last year dealing with different people telling me different things and getting my account all messed up. You've been wonderful here in the past getting things straightened out for me through private messaging. Can you please help me now?? I have the transcript from the chat yesterday and also the original chat where I signed up for the original 5 year deal. Thank you in advance!!