Unless it is a weekend or holiday, you will receive your tracking number within 24-72 hours of placing your order.
Please allow 24-36 hours after that for your tracking number to update online for orders sent from Singapore (The tracking number usually ends with SG) For orders sent from India (suffix IN), tracking numbers are notoriously slow to resolve in the system and just as slow to update along the way. Oftentimes a package sent from India will be delivered before tracking even resolves.
Until then, you will see an error that the order is not found.
However once package reaches your country, you will be able to track it on the public post office service´s website of your country