Settlement of Loan - NO FEEDBACK - NO CUSTOMER SERVICE

I called in last week to settle my loan. I got the settlement amount and did an EFT. I chose the public details listed on the banking app for Direct Axis Personal Loans. I thereafter checked the banking details, and it was different to the settlement letter. I have transferred a substantial amount of money. I called in to Direct Axis, and sent numerous emails. To date, I have not got a notification or response regarding my emails, or that someone was looking into my enquiry. I need to know that the money I transferred has been allocated on their side, and Direct Axis has different Divisions. I've emailed the necessary payment confirmation etc. This is pathetic customer service to not even acknowledge my emails!!! This is my money, and the bank wont even allow me to reverse the EFT.