As per the recent RBI circular, after 15th March, you won't be able to deposit funds into Paytm Payments Bank savings accounts.
To continue investing, you may please add another bank and set up a Mandate by following these steps:
1. Go to the Bank Details page
2. Click on 'Add Another bank' and complete the steps
3. Click on 'Setup Mandate and follow all the steps to complete your Mandate setup
If you already have an active Mandate with another bank linked to your account, update your mandate details for the SIPs.
Go to SIP, STP & SWP
Click on fund name
Modify -> edit -> more options
Next, select OneClick mandate