Atrocious customers service

I received an SMS from Vodacom on 9 April 2016 at 09:24 that reads 'Get double your data when you buy a 1GB monthly bundle for R149. That's 1GB free for 30 days with every 1GB you buy. Dial *111*415# to buy, offer expires 08-05-2016. Opt out? SMS STOP to 31118' NOTE: offer expires on 08-05-2016. On the 26 April 2016 at 19:16 I took up the offer and bought the bundle as instructed on the SMS. Sadly to this day Vodacom has not lived up to their word, I have not received the additional free 1GB data. Was this a **** Vodacom, are you sending these SMS's to cheat your loyalty customers? Furthermore, on the 29 April 2016, I contacted costumer service where I was told that they don't have a record of me receiving the SMS (I have the SMS right in front of me). I was promised by Cliford (consultant) and Viwe (Team Leader) that a query has been logged for investigation and that feedback would be provided within 2 to 24hrs of logging this query. Cliford further promised that Siya (another Team Leader) would contact me later that afternoon to provide an update. 30 hrs later I called again and spoke to Nkeletseng who confirmed that a query was logged and that she would call me back with in 30min. Seven day after of making the purchase, I have not received the data nor a call or any form of communication or update from Vodafone (have the decency to at least give some feedback) Vodacom, I urge you to grant what is due to me and allow us to part ways in an orderly manner.