Unproffesional Treatement and Refund not being processed

I bought a Hi-fi at Lewis store on the 5th of December 2017 and it stopped working March 2018. I therefore went to the store to request for assistance, the Hi-fi was then picked up on the 26th of March 2018. We therefore went to the store on the 29th of March to ask when will we receive the Radio and how long will it take for it to comeback. Elia Xaba from the store answered us by sating "you will get it when it comes back" this became more of a concern for a Lewis personnel to give us such a response we therefore went to the Store Manager Nomana who advised us that they have 21 working days to resolve the issue contractually, we just need to be patient. We therefore did as instructed and waited for communication from the store, to our surprise no one bothered to contact us with regards to the progress of the radio. We therefore went back to the store on the 30 of April 2018 and enquired about the progress of the radio and we were advised by the store manager that the supplier is still waiting for the parts. That is when we felt like this was unsatisfactory and requested that we rather be refunded and go to another store to buy another Hi-fi. The manager made few calls I am assuming to the head office and he the approval for a refund was granted. He therefore tried to perform a refund but couldn't do it apparently they have to wait for 24 hours before they can perform that refund and we were instructed to come back the following day that was on the 1st of May 2018. We therefore called Mr Xaba as we were told that he will be helping us, but to my surprise when we called he said he will not be able to assist us as they are many customers in the store we refused to take that as an excuse and told him that we are also customers then he said we can come and he will assist us. We spent over an hour waiting for him to assist us until he told us he cannot proses the refund we should again come back the following day, that is supposed to be today the 2nd of May 2018. Today we called the store and spoke to the store manager on the morning who advised us that he will see during the course of the day and contact us but we still haven't received a call from him and when we tried to call the store no one is answering and the manager number is also not being answered. We therefore request an urgent assistance as we want to buy a radio at OK Furniture and the Hi-fi we are looking for is on special until Friday. The worst thing about this is the fact that I had to take a day off from work to sort this thing out so that I can be able to buy the Hi-fi I am looking for before it goes back to the normal price but it looks like I will be waiting for something that will never happen again.