Harrassment to say the least!

Harrassment to say the least. I am constantly phoned from different numbers and different companies trying to sell me a tracking device. On Thursday the 26th of February I was phoned by Matrix itself and even after I told the agent I am not interested he kept phoning me telling me I am rude to put the phone down but honestly if you I tell you I am not interested and you keep phoning to the extent that I have to block that number there must be something wrong with him! Matrix better do something about this and urgently!!!!