You should be able to change your PIN from the locked screen of the app using the ‘Forgot PIN’ option.
Click on "Forgot PIN".
Enter the OTP sent to your registered mobile number.
Now, enter the PIN sent to your registered email ID.
Set a "New PIN".
Confirm the "New PIN" by re-entering the PIN.
Now again try to log in with your New PIN.
If you are not able to regenerate your PIN like this, please raise a ticket with us.
NOTE: On resetting the PIN, the withdrawal will be disabled for 24 hours for security reasons. You can retry withdrawals after 24 hours.
Disclaimer: Do not share your PIN or OTP with anyone. CoinSwitch will never ask you for your PIN or OTP.