This people call you trying to make you buy some heat reductory belt, even you try to stop the call they don't let you, and keep on calling yo to 8 times a day, is been 1 week for me now

This people call you trying to make you buy Moulding Motion 5, which is a heat belt, even you answer the phone and tell them to stop they will call you. In two days I received 15 calls at any time incluiding calls at 9;30 pm!! can antbody help me?