The Institute of Company Secretaries of India (ICSI) might have sent a confirmation email or SMS after successful payment.  Double-check your inbox and spam folder for any such communication.

Look for a payment confirmation page or receipt you might have received after making the payment. This could be a printout, email, or SMS. Use this to verify the successful transaction.

If you can't find any confirmation or the issue persists,  it's best to contact ICSI directly.

When contacting ICSI, have the following information ready:

• Your Name
• Registration Application Number (if available)
• Transaction details (date, amount, reference number - if you have it)
• Briefly explain the issue
  
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  I hope it helps!