Discovery Vitality - An example of worst client service possible

I've been in contact with Discovery regarding the Healthy Gear cash backs I am supposed to receive for purchases made since Sep 2018. I've provided Discovery with all the invoices confirming the purchases and on the invoices confirming the Healthy Gear Card used with the number. Since my first contact I've called them multiple time to get this resolved with numerous reference numbers and it supposedly being escalated to a manager, but to this day I have not received one call from Discovery to give me feedback. This, in my opinion, is the ultimate example of poor customer service. You sketch this wonderful picture to get the client signed up but when you have to deliver on the promise you totally disregard the client. My trust in Discovery has been severely damaged. I do not know how I am able to continue a association with a company that does not value its clients and cannot deliver on promises or just respect a client enough to call and give feedback.

Discovery has forced my hand in taking my frustration to a public forum as they do not seem to care about resolving this matter. They have had ample time to resolve this during the past 4 months.