No assistance, no feedback, frustration all around.

I am very disappointed with Discovery Vitality and Credit card division. More than 3 weeks ago, I attempted to boost an Apple watch. Discovery had changed the terms and conditions 2 days before I went into the store from what they had told me earlier on the phone that week. I now had to cancel my voucher, apply again and only then get this watch. This seems like false advertising as I've had to jump through hoops, go through insane amounts of admin and am just being pushed from pillar to post. Nobody responds to requests or comes back to me with any meaningful feedback and the story changes with each consultant i speak to. I have no idea how to get this resolved an am at my wit's end! I've literally spent hours on the phone speaking to call center agents. I have 3 reference numbers, one of which was closed without resolution.