Billdesk — payment issue for cat 2020 application

I have made a payment for my cat 2020 application through billdesk using phonepe upi on 11th of september 2020. Money got deducted from my bank account but it's not reflecting on my cat application. Even after waiting for 72 hours as suggested by cat helpdesk
It's still not reflecting on my application. As the deadline for applications submission is 16th september 2020 if the issue is not resolved my whole preparation of last 2 years will be wasted. Please help me in resolving this issue. I have already mailed this issue to billdesk @ [protected]@billdesk.com.