Poor Service

I complained to Vodacom Head office in Dec 2014 about a billing issue emanating from Dec 2013. They call me in Jan 2015 to resolve the matter and agreed to refund the money (R10 530) into my bank account within three (3) days from 07/01/2015. To date I have not receive despite many failed attempt to get hold of Vodacom Head Office via telephone &amp