False Advertsing

On 02/11/2015 I spoke to the Business Upgrade center, who told me that if I upgrade to the A7 I get a R500 free voucher as part of a special Vodacom is running, 2 days later I receive the new phone but NO voucher. Over a month later and numerous emails being ignored - I still have no voucher that is owed to me. I have spoken to numerous people (because responding to emails is very hard for Vodacom so I have had to send many emails) and it eventually came down to the fact that they were not aware that they did not have stock - why offer the special if there is no special. all the call center agents and supervisors I have spoken to me have told me it has been escalated - TO WHO??? if it has been escalated so many times then why is your \escalation department"not getting back to me!. Surely being such a large company you would have better checks in place with regards to stock. This is not ok - Where is the voucher? how hard is it to contact someone back. I am owed a voucher - this is complete false advertising. You cannot sell a package with a voucher and then just send a part of it."""