The email makes sense, because that's the primary means of communication for your amazon profile. The phone number is no where to be found, and was clearly given.
Our local big online retailer proxies emails sent to customers by third party vendors on their market place. There’s absolutely no need to share your email address.
In those mails there usually is an incentive in the form of a review/discount to persuade you to share info though, but that’s easily ignored.
In case they can't get in your gate or can't find your apartment, they need to call you. This is a commom practice in any home servicing industry to ask customers to rate them. The contractor is likely just doing this to stay on amazon's payroll.
They often try to get you out of it though, e.g. will reply with nothing but an attachment which is an image of their typed non-proxied email address they want you to use. (I guess Amazon filters it or tells them off if it's typed in the body of the email.)
