Terminate service - DirecTV

How much notice is required in order to terminate your services?
If you can't offer us access to NBC, then we are changing.
We have U Verse, internet, land line, and 3 cell phones with you. Att can certainly obtain the contract.
When will we know if you don't get the contrtact?
I will start calling Medicom, Cox Comcast and others................. tomorrow

This question, "Terminate service," is about DirecTV channels, programming, equipment, and sports.