Vodacom : Shocking service

I am so frustrated and irritated with Vodacom. I ordered my upgrade 2 weeks ago from Vodacom. I have been phoning them constantly in the past 4 days to change my delivery address, they kept directing me to different departments, kept me hours on the phone and guess what after following up today they still haven't changed the delivery address. I asked them for a reference number every time, they could not give me one. I asked them to send me proof that the change was done they said they can't. I have tons of sms for every time I have phoned them, which is very annoying. They have my incorrect cell number which I have asked them to change numerous times and they have not done so. The courier Ram has been to the old address about 20 times already. This is shocking service. I am so tired of dealing with such incompetency.