Vodacom renege on online contract special offer

On 2 May 2019 I app**** online for a special offer being advertised on the Vodacom website. It has now been 9 days and 11 call center consultants/ team leaders/ managers later and I still do not have a new phone or contract. the last feedback I received from Vodacom Social Media team on Wednesday is that they cannot find the deal being advertised on their website on their system and the matter has been referred to their commercial division. Since then I have been unable to talk to anyone or obtain contact details of any manager. It appears that I am now being ignored with the hope that I will give up on the deal.