Discovery complaint

I'm on Discovery health pathways program. I receive Discovery miles which I usually convert to Checkers vouchers in Discovery mall. Around 10 Jan I converted miles into two R250 checkers vouchers valid for 6 months. I went to Checkers Muizenberg and tried to use the vouchers on 11 Jan. To my surprise they said the vouchers showed already burnt,like it's been used already but I just got them and most definitely did not use them yet. The manager there Jaqueline took down my details, screenshot of the error messages they were getting and promised they would look into it. I also advised Discovery about the issue and received several messages to say it's being looked at. Was asked twice by different people what was the issue and keep having to resend info to Discovery when I gave them all the info in my initial query. It is now 5 Feb already, how long does it take for Discovery to investigate an issue, 1 month? I am tired of following up and beyond annoyed, I was embarrassed with this issue and I am out of pocket by R500 waiting for Discovery to fix their problem. Annoyed at Checkers also for their lack of response to date. Another thing Discovery, your app is useless, you can only play the game board on a Wed and then the system says there is some issue retrieving the data for most of the day, resulting in you losing your gameboard plays, maybe it's deliberate on your side so you don't have to give out the miles. Also the data on your personal health pathways is always out.of sync with the normal site which shows updated MSA balances but not on the.app.