Disappointed in Russell's Furniture store! I NEED MY Fridge!

I opened an account and took Furniture from Russells Pietermaritzburg PiknPay Centre. When they delivered my furniture, one of the items was a fridge(my problem) .. I switched on my fridge 4hours after delivery (as per instructions) only to find it was faulty I couldn't use it.. They delivered my fridge on a Saturday and I had to wait till Monday to report this which I did first thing in the morning when I got to work... They promised they would have an answer for me Tuesday, The store Manager gave me her cell so I can call her for updates.. Tuesday they told me me they sent me an sms (which I did not receive) saying they would deliver my fridge (exchange/replacement) on Wednesday.. I called on Wednesday and the Manager Zanessa told me I would get the fridge Friday or Saturday! Friday I called and she said Saturday, That is Today which when I called in the Morning she told me by 11am she will be delivering my Fridge together with the delivery guys.. It's 2pm now and she has not taken any of my calls or responded to my texts..

I am fuming as I have spent the whole week throwing out groceries including my Daughters school lunch groceries because the fridge they gave me a faulty fridge.. Today i went to buy More groceries because she promised me today... Aybo Guys I spent money buying food which will go off if I do not have a fridge!! How will I pay my installment for something I am not happy about and haven't used at all because Russells has taken so loooong to give me a brand new working Fridge!! I do not have a fridge! I am tempted to cancel my installment! This is absurd.. Having no fridge is frustrating! I cannot be throwing food away!!

HelloPeter please help ASAP! ???