Pathetic Service

I went to N1 in December cause my phone were freezing ,people call and the handset goes over to voicemail but the handset is on, get messages long after it was sent and when I'm on the there is an interference. They updated software in the store and said if persist, I should come back .I went back only for them to tell me I need to go to Canal Walk.Took the handset to Canal walk and the lady said it will take 3 days after the technician assessed the hand set and let me know if it needs to go to another repair centre other than that they will keep me in the loop as to the progress of the repair. I called the store 4 days after handing in the handset as I did not receive any communication from Vodacom and were told the handset is ready to be uplifted .I asked what was the problem and they told me the software was updated .I told the person that the software was updated previously and the same problems occurred afterwards, can I speak to the technician and was told the technician only starts at 15h00.I have asked for the technician to give me a call, till today nobody called.I logged this with their customer complaint,followed up but no response.