Poor service from Homechoice

Home choice called me and they told me that from the combo i ordered there was a slow cooker that was faulty so i must return it back ok i did that and return it back after that i didn't receive any feedback that says the parcel was received or not i was the one asking them about it when they call me about my monthly payment and when i called again i was told that my account was credited with +-R900 not really sure of the amount and that where i asked them how possible is that that slow cooker cant be R900 and i asked them that if that is the case the must rather give me another slow cooker that is not faulty that me accepting that credit. Its not my fault that they sold me a faulty item and now i feel like they are over charging me for the items that i still have so rather they take back all the items as it was a combo or they give me a new slow cooker. Home choice will call you 100 times a day but fail to give you feedback their service is poor. A feedback its important to a customer and updates as well. i called them again on the 25th and they not me that that i agreed to the terms that they must credit my account but no one has bothered to call me and tell me how much was i credited for i was the one doing that and the lady i spoke to told me that she will escalate it so i must wait for 48hours and they will come back to me and then today i decided to call them again they gave me the same answer that they have escalated my matter and will come back to me after 48hours .