Annoying calls daily

I received almost daily calls from homechoice asking me to buy something, I tell them that I am not in good financial standing and unable to buy, the next day I get another call I go through same process until I inform them that I am called daily and I am tired of their phone calls but still it does not stop. what am I supposed to do. My only mistake was buying blankets from them in November 2015 since them I have been called almost ever day. imagine if I buy another item they will probably call 5 times a day. JUST STOP IT.