You do not have to pay again. You just need to reactivate your copy of 360. Look for a Sign in link and just sign into your Norton Account to reactivate.
Norton has many videos detailing instructions for many of these issues. If you search the Norton website you will find them.
Norton is a self help piece of software and if you call “support” to speak to someone you might find it less than useful for sure. Better help is found here in these forums.