Vodacom Repairs, Why mara?

I am not happy with the service from Vodacom (repairs) in Highveld Mall Witbank. All I want is to get my cellphone repaired; a cellphone that is still under warranty. I went to the branch first time on the 14th of December and we could not be assisted because the lady showed no interest of helping and we just took it that it's because it was before the store closed and we let it go. We then went back to the same store (we have been informed that it's the only one that does repairs) on Monday, the 2nd of Jan and we were told that an invoice was needed and that it could not have been provided for us because we bought the phone from another branch. I then suggested that the assistant call the other branch to get us the proof of purchase and we ended up doing that ourselves. We called customer care and they helped us with the invoice only to be told by the assistant that the system is offline. Tuesday they were still offline. We went back on Wednesday and eventually the phone was booked in for repairs. I explained all issues to the assistant. I received a message this morning that that the phone was repaired, I tested the phone right there in the store only to find the issues were not fixed. I find this to be of great inconvenience for me to go up and down the store without proper service been issued. What happened to treating clients fairly. The phone had to be booked in again for the very same problem. Can they do their job or not? I am honestly annoyed by the treatment I received from that store. I feel like I'm asking for a handout and no one is willing to help. Why? Honestly, why?