Vodacom - Paying for product without receiving it

On 13 May 2023 I app**** for a cellphone contract at Vodacom Mimosa Mall, with Juan Badenhorst. The contract includes a Samsung A34 and 42 mm Galaxy Watch 4 Classic. I received the Samsung A34 on the day of the contract, the Galaxy Watch 4 Classic was not in the branch and Juan explained that the system shows stock availability in the Warehouse and he will be able to courier the watch to me by the following week. To date I have not received the Galaxy Watch 4 Classic. I have contacted Vodacom Mimosa Mall 3 times to follow up on when the watch will be delivered. The last response I received on 24 May 2023 is that there is no stock and it is on back order, while on the day of taking out the contract there was stock availability. Also it was mentioned that Juan requested feedback from Head office on the unavailability of stock but he is not receiving any response from Head office.