Just recieved a pop up window scam (No email etc...) Usually I just look at the details on the e-mail or message and you know it must be a scam becuase they never match. This looked legit (if unsolicted) but it was randomly offering a phone/tablet etc and nobody just gives things like this away...
Welcome to TPG Community and thank you for sharing this.
If you are using a PC, it is better to always clear your browsing history and run a quick scan to your device.
You may also check the posts in regards to this kind of issue. Refer to these links: Don't get scammed by dodgy internet pop-ups, How To Remove Tech Support Scam Pop-ups from Windows or MacOS, Identify and remove fake pop-ups.