Frontier Retentions Disappointing

I called last month about adjusting the cost of our 1gig service, which had gone up to 119.99, to be more competitive with offers from competition and new customers (been a customer since 2012). I was told they could adjust me to 79.99 a month and ai accepted it. It took me around 2 hours due to their system being down and my call being dropped. I was polite and patient the entire tine.

Today my bill is back up to 109.99. Called again and was told there were no notes indicating the agreed rate and the best they could do was 89.99. New customers currently pay 64.99. I am not sure what the disconnect is, but at this stage I am going to shop around.