Discovery Miles - Transaction failed and Miles not returned

My complaint is regarding a Discovery Miles dispute. I struggled to use my Discovery Miles as payment method on Takealot, which has happened a few times before. After numerous calls to Discovery Bank they assured me that all is fine on their side and I therefore retried. The transaction failed again, but this time the Discovery Miles was not returned. It basically got stuck in "reserved". I then logged a dispute with the Miles Dispute Team, which was a week ago. Until now (a week later) I still have not received my Miles back and Discovery has not contacted me to provide any feedback.

I have also phoned a few times over the last week to get feedback. I have not been assisted with any of the calls. My dispute has been escalated twice, still no miles returned and still no feedback. It seems pointless to keep phoning about this and to keep logging disputes or to escalate. It seems that nothing is happening and I am just wasting my time trying to follow up.