continious harrassment of this irritating business

I am demanding that this business stop sending me sms's to my cell phone. They have obtained my number *******ly as I have not authorized them to sell their products to me and it has to stop immediately!Ii want a letter of apology plus proof that they have removed my number from their list of victims and that will be for ALL OFFERINGS AND SERVICES! have blocked more than 50 numbers yet they continuously harass me. this is totally ******* and i will take this up with consumer protection if I do not have a satisfactory response from them. I have complained so many times and this is ending now!