Not happy with the service

I visited Vodacom 4 u Mall of the South, i did an upgrade on a data sim. When i got home i tried to do an online application for an I phone 5 but it was declined. The lady at the online help desk advised that i can only get up to 2 lines hence it was declined and i need to cancel the upgrade i did and try the application for the I phone again. I then called the Vodacom shop and the lady who assisted me advised i cannot cancel. I then called the helpdesk again and i was told i have 14 days to cancel. When i called the shop again to advise on the 14 days, i was told the lady who assisted me is on lunch i need to leave my number. Still waiting for the call back. I just want to confirm what the correct process is 14 days or no 14 days to cancel. If the branch was wrong they need to cancel the upgrade i did, because they wasting my time, because they are lazy and cannot go an extra mile for a client.