Discovery Vitality Rewards hell!

I have so many complaints about Discovery Vitality, I don't even know where to start but to avoid an essay, I'll only touch on a few here. After being a member for more than 11 years, I decided to cancel my Vitality membership in February 2020 due to the rewards becoming more and more diluted. It was so difficult to cancel but eventually I got it right. However, I was not notified at all that achieving goals for the last week of February 2020 would not be taken into account despite still being a member and that all my Discovery miles would be forfeited on termination. Therefore, I extended my termination to the end of March 2020 in order to redeem my Discovery miles. My husband and I have now used all the Discovery miles we could before termination. However, you need a minimum of 150 miles to redeem a reward so we have to forfeit the miles below as well as the miles and plays for achieving the weekly goal for the last week of the month which is also a load of nonsense. My latest big problem is that I used my Discovery miles for a DSTV Box Office credit but am unable to redeem it. I have wasted all my airtime calling the Discovery call centre. The first consultant gave me a 9 digit voucher code but I need an 18 digit rental code so I called the call centre again. A consultant named Kelly eventually transferred me to DSTV themselves to get a rental code but they were unable to assist. My Discovery Vitality membership ends tomorrow and all I ask is for the 18 digit Box Office rental code so that I can put all the bad memories of Discovery Vitality membership behind me and just move on with my life.