The number is answered by Svarslinjen, an AI phone line Andy also runs. Say "Hancocks IT" as soon as it answers, or read out your ticket number, and you're put through.
Your phone company charges a normal call, as for any call to a Swedish mobile number.
Once you're put through to Hancocks IT, there's nothing more to pay for the call. The few seconds before that count as Svarslinjen minutes, and a new number gets three free.
Questions that aren't about a job are answered by Svarslinjen on its own minutes: the first three are free, and after that you buy minutes at svarslinjen.se.