Can't stop unrequested website

edited June 3 in Mobile Security

I hope someone can please help me find a way to prevent the website called from appearing on my mobile. There appears to be no "unsubscribe" link nor any other provision on the website to stop or block these notifications that have been appearing constantly out of the blue over the last few days.

It is not through Gmail or Messages, it just appears behind my home screen in notifications.

Is there any way my Bitdefender Total Security can help me rid this most unwelcome website constantly appearing on my mobile?

Thankyou for your help.