Hungry Lion Worsr Service Ever

Hungry Lion sharons place in Pretoria CBD refused to accept my vouchers from Vodacom to purchase anything. They said they offline but were not able to show me any proof or slip that they are indeed offline. I asked to speak to a manager and 3 different women came to me saying they are the managers and they can't provide me with any proof? Clearly they were all lying and just not willing to help me because im purchasing with a voucher.