R500 voucher-pathetic service

Hi

Discovery vitality ran a promotion last year whereby if you sign up to be a vitality member you qualify to get a R500 voucher to shop at either pick n pay or woolworths. I saw the promotion through their app because I am a discovery medical aid member. The criteria was not use the gym membership benefit and also not use any of their boost benefits. You also needed to pay at least two instalments. I signed up to start in November and my premium went off end of November and December via my company. I called in to discovery vitality line in December and spoke to a guy who advised me that I will get my voucher in January because they waiting for December's premium to go off. I called again first week in January and Raeesa told me that I don't qualify for the voucher. She could not tell me why. I told her to go back and listen to the previous call and get back to me. She said she will call me the next day and she did not. I called in a week later and spoke to a manager who said he will follow up because he cant see any notes and he will get back to me. Ever since then I have not received any calls from discovery and I am very upset. Please assist.