This is exactly what has happened to me. They hacked my Amazon account and bought many $200 gift cards before the credit card company alerted me.
How did you find the ScreenConnect program to remove it? I was called by a company that claimed to be supporting my Netgear Router and they scammed me into all kinds of "paid services" they could supply me. They remoted into my computer and showed me all kinds of "traffic" showing I was being targeted. I now have figured out that this must have all been a scam for me to pay a couple thousand dollars and they are stealing my information. I have had 3 different credit cards hacked.