This actually appears to be a legit Amazon phone number. They can call you about all sorts of things but that doesn't mean you should let your guard down because scammers are known to spoof Amazon phone numbers very often.
Caller claimed to be from Amazon, I think, as his spoken English was so poor I repeatedly told him I couldn’t understand a word he was saying. Sounded Indian, which always rings scam bells. If Amazon do employ this person it’s a big mistake on their part to use people who cannot speak English.