You should be very careful with these types of calls. A lot of people get scammed because of their lack of awareness. I work in the e-commerce business, and online purchases are very usual for me. Personally, I prefer using trustworthy platforms. For instance, I often use the Amazon platform or mercari. And to be honest, I was shocked that you got scammed by an Amazon worker. Anyway it's great you found in time that you were getting tricked. Otherwise, you could've had serious problems.