Received Factory Fault Device (network problems), Technician Further Damaged Camera Upon Repair, Has been opened 3 times and Samsung refuses to exchange for new device. The device is only 3 weeks old.

I have purchased a Samsung Galaxy S21 5G on 02/10/2021. The phone started to show mobile network errors within the 1st week of purchase. At the time I suspected the sim card. The sim card on the device was a Cell C contract sim card. I then tested the phone with a second Cell C sim card, this sim card also showed network problems. Then I purchased a Vodacom sim card and this sim card showed the same mobile network problems. I then did a sim swap on my Cell C sim card and this also showed a mobile network problem. After testing with the 4th sim card I concluded that the problem was with the phone (All sim's work fine on my old Samsung Galaxy S7 device).

The mobile network problem I am experiencing is that the phone shows that there is a mobile data connection, but the internet and social media apps show that there is no data connections. This happens very randomly.

I have booked the phone into the Menlyn Samsung service center on 21/10/2021. The service center had replaced the main board and the rework kit. I collected the phone on 03/11/2021 and inspected the phone once I reached home. When I inspected the phone, I noticed that the top rear camera was partially sticking out of the phone. I then returned the phone to the Menlyn Samsung service center on 04/11/2021.

The phone was then ready for collection on 08/11/2021, when I arrived at the Menlyn Samsung service center, I asked for the phone to be tested on the system. The phone had failed the diagnostic on the back camera. When the back camera was inspected, it was noted that the lining of the camera was out of place. The phone was then sent back to the repair center.

On 10/11/2021 @ 11:22 and 11:25, the repair center technician contacted me and said that he has replaced the back camera with a new camera (I have a recording of this phone call). However, this is not logged on the system. This means he is being dishonest with me or he has not captured the 2nd and 3rd time that he has opened this device on the system.

I have only used the device for 3 weeks and it has been open 3 times. The device has been with the service center since the 21st of October 2021. I have requested an exchange on this device. I sent the phone in for network problems and I had to deal with the service center technician damaging my camera. The device has already been opened 3 times and I have only had the device 3 weeks.

The repair center technician has damaged my camera and has replaced it without booking it on the system. My claim for exchange has been rejected due to this. I cannot accept a brand-new device that has been repaired/opened/tampered with 3 times within a 3-week period. I have had a terrible experience with this purchase, can you please exchange this device for a new one?