Not happy with service given. Still need help and clarification

I called with concerns about my billing. According to my Feb statement I had upgraded my plan to the 5 yr unlimited with 2 yrs peacock premium included with i believe 2100 Mpbs for $85 a month (from a basic $30 plan) since the speed wasn't enough and I was tired of the additional fees yet I continue to receive fees and am paying upwards of $200 a month still which I no longer can do as the upgrade didn't not resolve my issue. I called and explained this. The rep then said she was offering me a "special" price for 6-10 devices unlimited for $79 a month. I explained I wasn't arguing but was confused how this would be better than the plan I was already paying for again explaining $85 unlimited. Her response was "you want to pay more"? Rude honestly and lazy for not listening to my questions and concerns esp because i upgraded in February over the phone with the understanding this would resolve the fees. Because I was getting no where with her I changed the plan and ended the call only to find out I was downgraded NOT UPGRADED! As this is the same plan i was already on from what i can tell. Only difference is im now only getting 600 Mpbs. If I want to upgrade back to the 2100 i was at its $6 more. Where does that put me at? Right back where i was at since February at the $85 a month apparently not unlimited with a 5 yr price lock plan (unlike the app led me to believe) and additional fees. I'm now at a lower speed, with no confidence this will resolve my financial issue ans no internet is worth $200 a month!

1) I need a plan where I pay a set fee truly unlimited every month or more suitable to our needsno more running out half way through the month!

2) why does the app lead consumers to believe it's a 5yr lock with unlimited data when it truly is not as I go over my allowance every month since upgrading in February? 

3) Please pull the call and provide additional training to the rep I spoke with last night If there is a record of my call. If its helpful i called at 8:52 PST. I truly believe I was not listened to and was downgraded not upgraded.

4) if I'm incorrect provide clear reasoning as to why now upgrading to what is the same plan I was on word for word will save me over $100 a month OR how 600Mpbs is better than 2100Mpbs as even with 2100 we still have loading issues on games and movies which I'll deal with, but my plan I was switched to seems like that problem will get worse! Super frustrated.