Promotional items not delivered

I upgraded my Vodacom contract in May. I ordered the Huawei MAte 20 Lite. On the website it was advertised to come with a free pair of Freebuds, and some vouchers. None of the promotional items were delivered when I received the phone. I called Vodacom customer care, who advised me to chech the huawei promo website (www.huaweipromo.co.za). There was no Mate 20 Lite promo there. I then emailed Vodacom customer care and was informed that promotional items are subject to stock availability (something that should be communicated more clearly BEFORE you upgrade). I am very disappointed with the whole Vodacom experience. It feels as if the promotional items are advertised to get you to take the contract and then once you have signed and paid the items are suddenly out of stock.