Vodacom not honouring specials

We upgraded 2 phones telephonically with Vodacom on the 23rd August to take advantage of the special being run by them and Samsung (where you get a voucher for R4000.00). The 23rd August was the last day of the special.

I expressly asked the woman who did the upgrade if we still qualify and she assured me that we will qualify for the upgrade as long as it was done by the 23rd. As we did it online we had to wait for the devices to be delivered.

We app**** for this voucher and it was rejected as the date on the Tax invoice says the 26th August, when the phones were delivered.

I have tried to call Vodacom and no-one calls me back, I tried their Facebook message service and they are not prepared to try and assist. I think this is terrible service from Vodacom and they should honour their specials.