You just gave a scammer your real phone number (which will be sold to telemarketers) or installed adware on your PC. There is no valid license key at the end.
Hotspot Shield license key (or activation code) is a unique alphanumeric string used to upgrade a basic account to a Premium subscription. Activating a key unlocks features like faster connection speeds (up to 1Gbps), unlimited data, and access to over 115 virtual locations. How to Redeem Your License Key hotspot shield license key
A Hotspot Shield license key is a unique code that unlocks the premium features of the Hotspot Shield VPN software. With a license key, you get access to advanced security features, faster speeds, and unlimited data usage. Without a license key, you're limited to the free version, which has restrictions on data usage and features. You just gave a scammer your real phone