Hello @user7015263 ,
We're sorry to hear you've had some troubles working within your account. Are you receiving any specific error messages, or are you running into any slowness or performance issues elsewhere on the site?
Every time when i enter the Card Details and billing address details and click on the submit, it is showing that please select other mode of payment.
In this case @user7015263 , it may be best to call directly into Billing, as I'm not running into the same error when I attempt to recreate it. Calling into Billing will also make it so you can ensure your credit card credentials are entered in as securely as possible.