Quadrupled Paybill Municipality Payment from Banking App

I used the banking app to pay my municipal account, The app quadrupled the payment in 3x additional separate payments and the service charges have already been deducted from my account. I contacted an agent via whatsapp, "Adoration" who advised that I should resolve with the municipality as they were PayBills transactions that aren't reversable. she escalated to paybills department. And was asked if I didn't make the payments by mistake? SERIOUSLY? YOUR APP RELEASED 3x ADDITIONAL PAYMENTS. Lets see the the response if any?