Facing a payment while paying kvs fee online, tell me how to fix it

Know from our experts how to deal with a failed transaction online. By when you will get your money back and what to do to make a successful transaction again.

After submitting my all details correctly while paying the fee of KV it shows sorry we are unable to process your request now - Invalid merchant details(ERRP004)
Please let me know how to fix it.
And tell me the procedure how to fix it properly
Thank you.