Overall, the service is OK. I'm paying $85/mo for...

Overall, the service is OK. I'm paying $85/mo for at least 5 MBPS download speed and I am getting that.
Billing/invoicing could be a lot better! I'm retired and on a fixed income. Last month, because of a billing error, I was invoiced only $31.16. I paid that. Imagine my shock when this month, the invoice was for $138.84! (They had found and corrected their error.) I called and complained and asked for my bill to not exceed $85. I was told the situation would be reviewed with the owner and I would get a call back with his decision. Guess what. I never got a call back. I guess that gives me the owner's decision!