Mbd failure to comply

I don't want to even put a star but. I am forced to. This business has kept on phoning me for the last 3 months daily asking about a Gerrit van niekerk and obviously that is not me. When I ask to speak to manager or someone with more authority they tell me to phone the center and when I phone the center I never get through. I am absolutely livid with this. Blocking the numbers doesn't help because everyday is a new number that phones. Please assist