Shabby treatement and lack of Treat Customer Fairly.

During February 2023, I visited The Glen Cell C branch. I have a contract with Cell C which was due for upgrade. I took 2 handsets Samsung. 5 months later the other handset touch screen was not working. Due to poor health i managed to book in the handset on 30 December 2023. After weeks of enquiring the status of my handset. I sent an email to the CEO's office and The Glen Cell C branch provided me with the report stating that my phone 2 years warranty was voided due to the damage caused. I refuted that and i was told that I will carry the costs of fixing the handset. The CEO office informed me that i should myself take the handsets to Samsung. I was told that the minute dent on the handset was established after the microscopic tool was used. They say the minute caused the handset touch screen not to function. Their investigation is based on assumption that the handset fell. I still repeat that my handset never fell. The document that i signed before The Glen Cell C branch it was marked "In Good Condition". I need Cell C to fix the handset or exchange it for a new handset.