Hi RAMKISakthivel,
We appreciate you reaching out to us. We understand that you are experiencing issues updating the eSIM procedure on your device, and your carrier suggests to have your device changed.
We recommend that you make sure that you are using the latest version of iOS 14 or the latest version iOS 15.
While it isn't inherently assured that an update will resolve the issue, updating to the latest version of iOS for your device can help isolate potential software issues.
Kindly secure a backup and update.
How to back up your iPhone, iPad, and iPod touch
Update your iPhone, iPad, or iPod touch
Next, we recommend that you check for any carrier updates.
The article below may help.
Manually update your carrier settings on your iPhone or iPad
If you need further assistance, we recommend that you reach out to us here so we can take a closer look into the issue: Get Support
Take care!