Disappointed and stalked by Homechoice

I opened an account at Homechoice and to the headboard and dressing table which includes a chair. The delivery was made in February 2017 but they included 2 mirrors instead of adding a chair. I returned the mirror and they brought it again in March 2017. Until now September they haven't delivered the chair. I'm harassed by their call center where I get a different consultant everyday and I have to explain the same problem 3 times a day. I have written e-mails to 2 different managers,called, went to Wynberg store in person and even wrote on Facebook. They always 'apologise for the inconvenience' yet no delivery is made. They are now calling me at work and demanding a payment but I didn't receive the whole order. One consultant even told me she doesn't care because her name will not be in the credit bureau. I don't know what to do anymore because they refuse to fetch the products, refuse to bring the order and harass me daily via e-mail and phone.