There are many telephone scams currently operating. If you get a call from “BT” or “Microsoft” regarding a problem with your Internet, it’ll be a scam.
Similarly if you get a call telling you that your Amazon Prime subscription is about to renew, that’s a scam too.
They all try to talk you through several “demonstrations of problems” resulting in you giving them remote access to your computer, and then your bank or credit card account details.
Unfortunately such scams are widespread, and some can be very convincing. Stay vigilant.