what happened to upgrading 7 days prior to upgrade

So I chatted to a Vodacom upgraded agent via the website this afternoon as I was interested in upgrading my contract to the ipad air for R379. A lady called me back and advised that I cannot upgrade and have to wait for the new month. I thought u could upgrade 7 days prior. Thank u Vodacom for treating me like a values client. Is this is the level of service is should expect I will rather cancel this contract and take my business elsewhere. I wonder if I will be contacted by the complaint dept as Vodacom doesn't value their clients business