NEVER answer a phone call (mobile or land line) from a number you do not recognize- if it's important- the CALLER will leave a message. These SCAMMER/SCUMBAGS WILL NEVER LEAVE A MESSAGE
This isn't a real company offering you a real service. There's nothing to win and no list to be taken off of. There's no reason to talk to them or try to gain more information so you can "report" them or anything like that.
It's a scam and thus the Do Not Call list doesn't apply. Ignore what they're saying about a prize or offer or anything like that. Treat this like a person on the street came up to you and said "Can I have your credit card number".