I Canceled Robo killer but I am still having my calls blocked by them. I canceled Robo killer because it cannot distinguish between spam calls and people returning my calls from a number other than whats in my contacts - very important calls I do not want to miss. Please turn this Robo killer program off - I do not want it anymore. And stop removing money from my account, just stop please!!! User's recommendation: Be careful what you wish for. Robo killer’s intention I’m sure it’s good but it cannot work because it cannot distinguish which are the spam calls.