Cellc Sandton sold me a device with the incorrect information

i had purchased an Huawei P9 Lite from Cellc Store at the Mall of Africa , the consultant had told me the phone supports wifi calling hence i purchased it on a pinnacle package , only to find out i was *****ed over and im paying for a phone that doesnt have wifi calling and cellc has not done anything to correct this error by refunding me or exchanging the device which supports it