Vodacom ******* for Shake promo

I received a R50 meal voucher for Wimpy from Vodacom for the Shake Up on Saturday, 26 October which expires on 1 November. I went to Wimpy Gateway with my 8 year old son to redeem and was told that the voucher code is invalid. I then called Vodacom and spoke to Yvonne who said the voucher is showing as pending and that I must try on Sunday. I then went to Wimpy Nandi Drive on 29 October, Tuesday which is 3 days later. They code is invalid on their system. I then called Vodacom again and spoke to Zanele. After waiting i was told i need to order online only for Wimpy in order to redeem. While at the store the i checked for Wimpy online and there isnt an online ordering system for Wimpy. I then asked the manager and he said there isnt. I then called Wimpy customer care and they confirmed that Wimpy dont have and online ordering system. I then called Vodacom again and spoke to Busani and explained what Yvonne and Zanele told me. I then also told him this is a waste of time, petrol and airtime. He then said he will log a call for it and a tehnician will get back to me within 24 hours. Guess what, 24 hours have finished and no call.