Manager Godfrey and his sales consultant Sandile sold me a damaged Samsung J5 Pro cellphone and gave me a very bad attitude with 0 assistance upon laying my complaint

I recently purchased a 2017 Samsung J5 pro cell phone from Total Sports Carlton(assisted by the Branch Manager Godfrey and his sales consultant Sandile. The Carlton Branch didn't have stock and decided to do an inter branch stock transfer from their other branch in order for me to get the phone. The box was not sealed (as it should have been according to Samsung)when the phone was brought to me & i was assured by the branch Manager, Sandile & the other girls working there that the phone was being assessed if weda or not it was as a demo as they have sold a demo phone to a previous customer, less than a month the phone had sound problems etc..i then went back twice to the Branch to inform them of this, they gave me so much attitude and paid no attention to me or anything i had to say and just carried on with their duties as if i was not there, i had to leave without getting any help. To this day im still holding on to this phone that has no sound, etc. Id advice everyone TO NOT EVER purchase any cell phones from TOTAL SPORTS or any of the TFG stores.