I had a call from a similar person-Microsoft tech .I received error messages. Indian English. I asked him for his telephone number. He kept dogging. I persisted. Finally I told him I got you into a prolonged conversation because you are been monitored.
It's a fake microsoft number and they want to get into your computer. They also post fake 800 number in Facebook as Click4Support and want to get into your computer. Microsoft can only be reached by live support or e-mail. Facebook cannot be reached by telephone. They are hackers.