Worst service

I have been with Vodacom for the past 18 years and have taken 9 contracts from them. I received a call from them to upgrade my contract as it was due for an upgrade. I was not advised that they were having a promotion and that you received a R5000 traveling voucher with an S8 or note 8 upgrade but eventually I did upgrade to a note 8. Afterwards I figured out that they were having the promotion and I didn't receive anything, so I called Vodacom directly and spoke to a supervisor, who was so rude to me and told me that the promotion is only for the chain stores and online. The guy was so rude and my point is that if the promotion couldn't be done over the phone why didn't he advise me before hand. Being a red advantage customer and being with vodacom for 18 years I received nothing back from them and for them to treat you like **** after asking them why you wasn't even notified about the promotion, it just makes me feel like vodacom gives a damn about their lotal customers.