Latest Vodacom Sim only data deal - no bonus data

On 08 March 2019 I took out a new sim only data deal - 15Gb per month for R179 (as advertised by Vodacom online and in-store magazine) at the Canal Walk Vodacom store. I received pro-rata data for the 5Gb daytime, and 5Gb night owl, but did not receive any of the 5Gb bonus data as advertised. I was told to check the next day. After 3 visits back to the store and multiple calls to Vodacom over the past 3 weeks, I still have not received any portion of the 5GB bonus data. Vodacom call centre blames the store and the store say it is with Vodacom. Appalling customer service and no ability to resolve a very simple issue.