refusal of return of goods

When buy a phone they did not want to assist me with returning phone as it did not meat my requirements The shop attendand was rude and said that she will not return my money after the phone was bough 30m earlier after opening boxs i could see the phone do not support wattsup

The shop attendants at PEP north cape mall Kimberley south Africa refuse after requesting to speak to the manager the request was refused and security was in store called by dont know who and dont Know why but the mall security was shouting at me to stand up after i sat on ground waiting for manager to assist