Misleading advertising

On 26 April 2022 my wife upgraded to the P50 Pro. She chose this handset because of the extras included in the deal. Said extras were earbuds and a smar****ch. Shew did the upgrade online and only received the phone and earbuds on 3 May 2022. We then attempted to apply for the watch on the Huawei app but this was not possible. She spoke to a sales rep at the Tygervalley MTN branch and was informed this had been a promotion that ended on 30 April 2022, but the invoice reflected 26 April 2022. The sales rep then contacted her area manager who informed her that they are unable to assist my wife as this was an online upgrade. If she had been aware of this she would have upgraded to the iPhone which had been less per month. She only took the P50 because of the watch included. For the last two weeks when contacting Mondo they send the closed link for the watch redemption and when told this does not work they say the that the promotion was only for April 2022. This feels like very misleading advertising and the upgrade would have been for a Apple iPhone if this had been known.