RESIDENTIAL INTERNET SERVICE TERMS AND CONDITIONS
»www.frontier.com/docs/te ··· inal.pdf
paragraph two in the pdf answers what the cost is for early termination read it $200.00 max if its just a price protection agreement and $400.00 max if its a price pro with a gift like a tv or apple gift card.
You may terminate the Service if we do not remedy any ongoing breach of the terms and conditions in this Agreement within thirty (30)
days after Frontier's receipt of written notice from you of such breach, which is your exclusive remedy for a breach by Frontier.
explain your reason where there is a breach on thier part and not meeting said speeds I would state in a demanding way to fix and this is the good part demand actual evidence as to why this happened. The reason to demand writen proof its basic contract law they have to tell you. so not only can you cansel the service but ask for money too if they fix it in the 30 days they owe you back money and if they dont fix it you should still ask for money and can cancel with no fee at all.