Adding new UPI is very easy. What you have to do is Simply add that Bank to your Bitbns whose UPI address/id you want to add to your Bitbns account.
For Example, You want to add an HDFC bank account UPI address or PhonePe (or any other UPI service provider) UPI Address that connects to your HDFC bank. Then Simply add your HDFC Bank account to your Bitbns account and Transfer funds from that UPI address that is connected to your Bank Account.
Once the Fund gets added to your Bitbns Account after 2-5min your UPI will get also attached to your Bitbns account.
You can check here once it gets connected https://bitbns.com/trade/#/profile/upi-details
Note: Deposit a minimum of 100 INR.