Missing payment/duplicate payment

Absa's saying there was no technical error, but I've got proof of duplicate payments (R2000×2). The balance didn't update on the payment day to prove that there was an error payment didnt go through the time I was making it i tried again and it didn't go through again and it was before 11am thats where I made another R2000 and that one went through, and I only got the notification the next morning (26/11, 6am) for 2× R2000 that didn't go through on the 25th of November.

If you say there was no issue on the app, how did a payment made on the 25th process on the 26th without me logging in? I've got the proof of payment notification.

I'd like Absa to refund my R4000 ASAP. I'm getting tired of the back-and-forth and need a resolution. Best, Nokubonga