Frontier communications co Will not honor a confirmed deal South Windsor Connecticut

I called to upgrade my internet service to 1 GIG, 5/4/21. The agent offered a deal of ~$100/mth with fees and taxes. I accepted, was told my equipment was already upgraded to provide 1 gig service and no tech would be needed. My confirmation #79329013. Agent told me it would take 4 to 5 days to see the change. On 5/22/21 I hadn't seen any major increase, so I changed my cabling from Moca to Ethernet. I called tech to switch to ONT, which they did. I saw a slight increase, but not much over 100. The tech looked into what was going on and transferred me to a sales agent. The sales agent proceeded to tell me the original agent from 5/4 was wrong and that the price would actually be $139/mth + $85 for a tech to come out. Now I'm in a bind, I travel for work making it hard to schedule a tech, plus I outraged over the sudden bate-n-switch. This practice is grotesquely unethical and immoral. My equipment is the best they provide, my connection is fiber to Ethernet. There is nothing to check. Let alone I made the order back on 5/4, and no one called me or did anything about it. Forcing me to call them and told the last agent was wrong; so there's no accountability, so what's to say the agent today was right. Frontier made a deal, and as far as I'm concerned they're in breach of contract. THEY NEED MAKE THIS RIGHT!!!! They have recordings to prove what I'm saying is true. I'll be posting this on the BBB, consumer complaint and the public service commission and any other posting I can find. This is fraud; to think I've been loyal for 12yrs, even when they sneak in an extra $10/mth. Buyer beware!!!