cellucity phones

I took a contract on the 7th of April 2024 and by the 21st April 2024 the phone was acting up, freezing and switching off. We tried to return it to Stellenbosch vodacom, the technician told us they cannot book it in becuase we signed the contract with Celllucity. We then travelled to Sommerset west, who took it to Canal walk then Joburg. The device was returned on the 10th of April, only to find that it is not fixed. the device is still faulty. When i called i was just told the phone needed software upgrade. I then went to Cellucity to complain, Jarred the manager was off duty, the lady who helped us signed the contract called him and he was not much of help either. I do not want this contract anymore, i want to cancel and will take the phone with other networks who will be helpful how can i continue to pay for such faulty device? at first i thought they will gladly replace it with a new one, now having to return it twice, I cannot, it is just not on.