Complain against TFG group store, JET Mayfield branch

Goodday I have a complain about JET store Mayfield branch under the TFG group, on the 19 January 2024 I bought a phone from the store a Nokia phone 105 Vodacom network. A couple of months later the phone was not functioning well and I took it back to the store with the box and slip, they photocopied the slip and took the phone in for repairs. After a few days when I took the phone for repairs I was sent a message on my phone that the phone was taken by the courier guy. A few weeks later my phone broke that had the message that was sent to me but I did not worry because I was expecting the store to communicate with me when the phone comes back, I waited for the store three months for communication that the phone is back but still to date I have not received any communication. Today on the 5th July I decided to go to the store to check want is happening regarding my phone, when I got there I was asked where the message is and I told them that I don't have it anymore, I was also asked about my slip I told them that I have lost it but I told them that they photocopied it. The lady who assisted me when I brought in the phone still remembers me and confirms that it has been long the phone was sent for repairs .she referred me to her boss, that lady kept on looking in some file then after a while told me she can't see anything, I asked what happened to the slip they photocopied and I was told everything was taken by the courier guy and I asked my self how is that possible, then she referred me to Lerato who said she is the manager when I asked for a surname she told me she is the only Lerato in the store that is working there, when I asked isn't she suppose to be wearing a name tag she gave me attitude and didn't answer. She simply told me she was going to send an email to her boss and CC me in the email so I can have proof that she sent it. After a couple of minutes of waiting she told me that her boss said she should not distribute the email, she simply took my phone number and said she is going to get back to me, when I asked for how long should I wait for response she said she doesn't know, again I asked her to write something as proof that I was there and what my case is she refused. When I asked her what happens when I come back and don't find her to check my phone she simply didn't answer me. I am very Disappointed with the service that I got from the store because I don't understand how they don't have proof that I submitted my phone in the store. Im very disappointed with the service, the attitude I was given and non compliance of the names of people who where assisting me. As a customer I need to know who is assisting me but in that store no one a name tag. Please may you assist because I really need my phone back, I cannot purchase something and not have that item with me.