Sounds like the typical scam operating method. They say they represent Norton/McAfee/Amazon or similar,, get you to download teams and login to your bank. They then manipulate your screen to make it look like you have 'accidently' been refunded some money. What follows is a lot of call transfers, requests to action payments or buy gift cards which need to be posted.
Scammer payback on youtube goes through the process regularly and turns the tables by logging into their systems, deleting files and phoning people to warn them when he eavesdrops on calls in progress.
