I'm sorry to hear that you were having trouble with your connection. I certainly don't think that you did anything to cause the squirrels to chew up your phone cable, but we did send out a technician from AT&T to replace the cable, so such would not be valid grounds to cancel the contract.
We had the technician out on your premise on 10/16 to repair the squirrel-gnawed line. Next day, 10/17, we did further testing with you and found that the jack you were connecting the modem to didn't have a dial tone, so we moved the modem to another jack which did, where it was able to connect - this is clearly an inside wiring issue, and again, not something under our control nor a valid reason to cancel the contract.
We did not realize you were having any further trouble with your line until you contacted us on 10/22, demanding to cancel the account immediately. We did offer tech support to troubleshoot further, having successfully handled the previous two issues, but you unfortunately declined. We would be happy to resume troubleshooting should you decide to come back and resume service with us; otherwise, we wish you the best with your future ISP.