Unsatisfied customer. 2 factory fault washing machings

I bought washing machine on credit in July, I used machine twice and after that the machine was no longer working. I reported machine and they told me that I must go to store and choose another washing machine they will collect the one which is not working. I went to the shop and choose another, unfortunately even the second washing machine is not working. I called them and report the problem and they told me that they will send defy technician but am no longer happy with the product because I have 4 months paying product that I only used twice. So I went to the store and beg them to cancel the purchase since no longer happy with their product and they endup canceling the credit but I feel like I was robed because I was not refunded the money that I paid for 4 months including the deposit. ( R2300 .00).