Stranded because of Standard bank

I have 2 personal loans with standard bank and both are supposed to be debited on the 25th of each month. To my dismay on the 24th of January 2020 I deposited funds into my cheque account that I needed to use but as soon as I did so a debit order went of for one of the personal loans and about an hour later the second debit order went off and bounced because there was not enough funds. Now I sit with a shortfall in funds that I needed to use today urgently and my car is being held by a dealership leaving me stranded because I cannot pay and I've also been charged an unpaid item fee by standard bank because of this. I've called the call centre twice only to hold for over 5 minutes then get cut off. I'm stranded in distress all because of standard bank.