Windows 10 Pro Activation expire date (your windows will expire soon)

I think your problem is that you have a volume licence. This would normally be supplied from an organisation and windows is checking for a domain or server to validate activation. It cannot find the domain/server so your activation will expire as stated.

Where did you buy the laptop, you need to check with the seller. Bottom line is you don't have a valid personal licence.

The installed copy of Windows 10 Pro is a volume license KMS client which requires reactivation every 180 days. This can only be done by authenticating on an organizations domain or VPN into their network.

A new computer preinstalled with Windows 10 would not be using a volume license client. Also, it would not be provided as a separate package:

but have since thrown the packaging and product key away because i activated it.

Only retail licenses are sold as separate package.

I would try running the Activation Troubleshooter first to help determine the correct license for your system.

It will either say it doesn't have a license or the system has the wrong edition installed.

Use a Digital License to Manage and Activate Windows 10 Anniversary Update