Dont answer the phone, or even better ask them what your ISP address is and how many data packs do you send across the net, or what your internet protocal is. If the answer to any of those questions is UHMMMMM? then F**K them and hang up.
Some heavy Indian accented male keeps calling my cell phone number about my computer sending "errors". Requested for him to STOP calling me, numerous times, while he argued with me about the "error alerts" being sent to him about my computer, after going through this for a few times I was told rudely "yes, you just check your computer, it will die soon if we do not fix your errors" and hung up.
Has called for the past few days now - getting tired of it.