30 day cancellation window doesn't apply to returning customers?

We are a small non-profit that had been loyal comcast customers for years, and this past week we were treated horribly, and told that on the new contract we just started we couldn't cancel though we have had a lot of issues with the service and are within our 30 day window. This was not a renewal but a brand new contract. Has anyone ever heard of this? The customer service representative was beyond rude and we were going to try and call tomorrow. But nothing I can find in the terms and conditions or the service agreement have an exclusion for returning customers.

Is there anyone we can speak to further other than calling back the number? To make matters worst we have just found out we will be moving our home base out of state in the next few months and I have just read horror stories about moving and service. We have still a few days within our 30 day window, so we want to be sure we document and follow due process. Any help? Any comcast mods that we can discuss with?