Terrible communication

Bought a phone, it was faulty right out the box. Took it back , has it booked in for inspection and told I would get an update within 3-5 business days. 7 business days go by , I call and get told I need to call earlier next time and will have to call the next day (audacity), I hadn't heard back but got told I should call sooner. I go down to the Vodacom I bought and returned the phone too, even the kind teller was confused as to why I hadn't heard back and called to check for me and then AND ONLY THEN I find out I have to wait another week because the device was found to be faulty and they'd be sending me another one from Johannesburg (rather than just allowing the store to issue me one.) I am mostly fruarted by the service from Vodacom itself and not the actual store staff. A terrible lack of communication , total inconvenience and no apology or anything of the sorts from Vodacom.