The case of the missing Discovery Miles

I paid a Takealot with discovery mile, but the transaction failed, then a paid via another bank, but noted that my discovery miles have been deducted. I first contacted Takealot and they sent proof that the discovery miles never reached them and I should enquire with my bank - which I did on 23 Dec 2022 and again on 9, 17 AND 27 Jan 2023 - still no word, no feedback, nada!! This is not cool Discovery. I have loved you so far, but nee man - give me feedback please!!!