Water damaged phone lie

After buying a defective Nokia phone from Ackerman's 14th Ave Hyper, we booked the unit in for repairs. the phone was returned and after months of waiting we were told that a software update had been done. the phone was still faulty and glitching. we returned the phone to the store, and it was sent to 3G mobile again. I received a SMS stating that the phone was out of warranty due to water damage, a complete lie as the phone was faulty from the day that we opened the box in store. (wouldn't charge properly) 3G Mobile claimed that we would need to Pay over R1000.00 for it to be repaired or pay a R300.00 rejection fee. This is absolute ******* and nonsense. when I called 3G Mobile the rude lady on the phone stated that I am not allowed to call them, and that Ackerman's must do so. they refuse to give the phone back stating I should now pay R600.00 rejection fee for the first assessment done, where they stated that a software update was done.?????? Still waiting for the carefree staff and management at Ackerman's to respond. the phone is still within warranty.