Login to Finjinn App using your credentials.
You will be directed to the Home Page.
On the Home Page , click the menu bar (3 horizontal lines on the top left hand corner).
Click on Billing, Invoices
Click on the 3 dots which appears on the top right side of the screen
Click "Change Plan"
Select the Plan
Select if you want to go for Annual / Monthly Payment
Enter the Invoicing Details
Select the mode of Payment
Enter your Mobile Number
Payment will be completed, and the Plan will be changed.