Missing payment from discovery account

I did a real time payment from my discovery account on Saturday morning. On the app a message popped up saying there was an error. Later that morning I see that the money was taken out my bank account. I called discovery and they said the money definitely went through for payment. Yet to date 4 days later this money isn’t reflecting in the account I paid to. I checked with FNB and they say the funds never came through. I have called discovery 6 times since Saturday and nobody has been able to assist. I called now and demanded this matter be escalated as these funds were for my electricity bill. I was then told that the turnaround time is 10 days. Why should I suffer for a glitch on discovery’s app. Furthermore I have to pay late penalties on my electricity bill because of this. I find the service that I have received since Saturday extremely poor. Pathetic service from discovery insure consultants who kept telling me the fault was with FNB when it in fact wasn’t.