Disappointed and Frustrated with Old Mutual

My issue is that I bought airtime worth R260 (MTN) via the Old Mutual Money App on the 15 May 2023, I never got the airtime and the transaction doesn't appear on the app or statement... I called on the 16 May 2023 they promised to look into it, I called today 25 May 2033 to check for progress, they told me there's no feedback yet and that they will call me and their investigations have no turn around time... I am now without airtime to make calls as I buy airtime on the 15 for the whole month.. I am truly disappointed and frustrated with Old Mutual I'm even considering changing bank as this is not the first incident of inconvenience I have experienced with this bank... I am Sinethemba Gabada my number is ***