Rochester - Poor quality and not refunded in full

I made a cash purchase for the 3 piece Sienna lounge suit from Rochester Northgate on 4 March 2019. On 1 April I called Rochester to informed them the 2 couches were squeaky(RO-Z-***). They came to inspected and collected 6 April 2019. I did not hear back from Rochester and called on 12 April 19 and was told the sofa is with the supplier. I had to continuously call to get and update from Northgate Branch and head office (there was no progress and I was told it is with the supplier). 7 May 19 I was advised by sales person the sofa had been discontinued and they will refund me. I provided the necessary documents, amounts, ref numbers etc for the refund. Rochester collected the 3rd piece sofa on 17 May 19.I was told it will take 7 days to receive the refund however, there was still a delay with my refund. I called the branch several times and was told they are waiting for regional manager etc to authorise the refund. They finally refunded me on 13 June 19, however, the amount was incorrect. I called and informed the branch, they said they will process the balance but when I called for an updates I was told there is an IT issue. I called back they say the problem is bigger and IT cannot resolve it. I said I will come to the store for my refund and they said its not possible. I called today 2 July 2019 and there is still not resolution on my refund. I was provided with the following numbers Log Number 122706 Log Number 117646. Rochester provides poor customer service, they communication is poor, they product is poor for the price. I want my refund in FULL.