bad customer service

I bought a phone at cash crusaders durban cbd end of August 2018, the phone has a one year warranty last week i experienced problems with the device and went to the branch of friday 5 October to get assistances only to find a notice, informing that the branch is under renovations and should be open on Monday 8 October and had a contact number for any inquiries. I returned on Monday only to find that the branch is still not open spoke to a lady by the name of Alish who was no help after explaining the seriousness of getting my problem fixed as soon as possible , she advised that the branch renovations are still not complete and the branch will be open by Friday latest Monday the 15th of October she also advised that I contact the manager on the number displayed which I did on the 9th of October only to speak to her again on the phone and she advised the manager is off hence the phone is with her I will have to call back later at 4pm or 5pm which I did, I called several times phone was not answered left several messages for them to contact me but still no response. This morning 10 October I called again still no one answered. I am very disappointed for the service given to me mind you I own a small business and this has affected me greatly. Why ask me to call if you not going to take my calls and you not going to respond to my messanges.