Constant Harassment on my cell and work place

I closed my Lewis accounts n for almost year Lewis employees from the shoprite park and Claremont branch are harassing me and my family. Ive been more than clear that i want nothing to do with Lewis but they call at my workplace and on my cell constantly. I'm close to going to the shops n being rude to the people calling me. I want them to stop phoning me n my family n remove me from their records. They have become so desperate for business n that they don't realise they harassing people Can someone tell me how to get rid of these people?<br> <br> I left them because they were underhanded and received extremely poor service from them and each time they call they ruin my day, they don't listen. <br> <br> IF THIS DOESN'T STOP I WILL GO TO BOTH STORES AND CAUSE CHAOS!!!