Microsoft tech support scammers - suspicious activity detected

scammer
888-604-6636

#1

Number: (888) 604-6636

Msg they leave:
Call us from Microsoft Technical Support Team and hear some suspicious activity has been detected on your computer due to firewall compromised Please do not any financial activity on your devices until you speak with a technical support representative or else your financial information can be at risk to secure your data immediately call on our toll free number 188-860-4663 extension 6.