No kidding. I just cancelled Directv at the end of January. I told them exactly why I was cancelling. I have gotten calls every couple of days from random numbers and it is a directv sales call. I block it just to have a different number call. Its harassment.
Register your phone on the national Do Not Call list. If they still call you after 31 days of joining the list you can make a complaint. The more complaints they receive the more likely they will be investigated and/or fined. As a former DTV employee, I can tell you that you can also ask to speak to a manager in either the Customer Retention Group or the Office of the President. If it truly is DirectTv (or any of the other providers) calling you, when you reach one of these managers tell them that you want to be placed on their DO NOT CALL list and if they do not comply you will start filing legal complaints. Most legitimate companies do NOT want to get a bad reputation. If it is an outside authorized reseller for DirecTv/DishNetwork, etc they will give you the run around and won't transfer you to an actual manager, however you can find out who it is that you're speaking to and report them by calling the DirectTv or DishNetwork 800 numbers and asking for CRG or OotP (as mentioned above) to file a complaint. After enough complaints they pull the outside resellers authorization to use their name, sell their products or represent them in any way. Good luck.