Appalling service

I recently bought a cellphone at Woolworths Connect and I was advised that should the phone give me any problems within the first 7 days I should return it to any Woolworths Connect and it will be treated as OBF and they will exchange it for me. yes the phone was heating up when i was on a phone. I went to Woolworths Kerk Street and i was advised they didn't have stock and managed to find stock at Woolworths Jabulani Mall. I was assisted by the lady Penny, she advised me that the OBF process was changed and they had to take my phone to Vodacom for their technicians to confirm if indeed the phone is an OBF. I was told they will contact me by Tuesday to give me the outcome. To date I'm still waiting for my phone which I paid and still nothing from Woolworths. I'm so sad by the appalling service they giving me. I will not recommend anyone to buy devices at Woolworths Connect as they fail to follow OBF process and fail to give customer service and keep to their word of providing feedback to their customer.