POOR QUALITY GOODS

I bought some curtains online from Home Choice over a year ago and the quality was not up to standard. There were flaws in the material, cotton not snipped off and shabby machine stitching. The order was sent back to Cape Town. Home Choice called me and attempted to sell other items, and I politely requested they do not contact me as I am not interested in purchasing poor quality items from a company that dares to sell poor quality goods. Now I have requested this on numerous occasions of Home Choice call center, but to no avail. I get hounded up to three times a week. As soon as I block one number, another one is used to call. I have over 20 phone numbers blocked for Home Choice alone. WHAT MUST I DO IN ORDER FOR THEM TO STOP HARASSING ME??