Poor outgoing email

I had poor out going email for two months with no action by Cox. Cox representative agreed that it was their issue all three times I called Cox.  a $5.00 credit was given to my account for two months of in consistent email service.  I filed a complaint with FCC and received one phone call from Cox  who left me a number to return the call. I returned the call and never received another return call.  I just received my second letter from Cox stating they returned my call which I did not.  I called the number and the message said the would contact me the next day, which Cox did not.  I think I should given credit for 33% of my bill for two months since service was next to non existent.