Discovery Cash-Back a ****?

I regret to write a complaint about Discovery as I have always admired the company, but I have been very disappointed with the Cash-Back program, and extremely shocked at the poor service I have received from the call centre when querying the cash-back, particularly from a manager called Kimberlee. I have a query regarding the cash-back received on my Woolies card as it went down from R1,000 in February to R142 in March. After phone calls with Refigan, Ayanda, Deshnee and Shaad, I eventually escalated it to a manager, Kimberlee. She was extremely unhelpful and arrogant. Because I have not kept my Woolies receipts, Kimberlee refused to investigate. After much arguing and discussion, she asked me to email her the details of my query which I did on 21 July. When I got back from overseas on 19 August and saw no response, I again emailed her. It is now 5 weeks since my first email, and she has not bothered to respond. I have spent many hours ensuring our family is on Vitality Diamond status to ensure we benefit from the cash-back rewards offered, but I suspect it's all marketing hype. I sincerely hope not as this is not the kind of service I have come to expect from Discovery.