Unfortunately, you haven't won one of PCH's contests.
PCH doesn't call winners or give them any advance notice at all for their major sweepstakes. Real winners get surprised in their own home by a visit from PCH's Prize Patrol, which will just hand them a check.
PCH is well aware of the scams perpetrated in their name and they warn of them on their website.
The Better Business Bureau also warns of this scam here:
As you can see, they are asking you for money for transfer fees, taxes, insurance or shipping. While that may sound logical to you, it's the #1 sign of a scam. You would never have to pay anything upfront for any reason at all to collect money that is already yours. PCH will be the first to tell you that if you have to pay anything for any reason at all, you haven't won one of their contests.
You're the victim of a crime. Report it by filling out the online form on the FBI's Internet Crime Complaint Center's website at www.IC3.gov. If the authorities can find out who and where your scammers really are, you can get your money back. If not, you can write off your losses when you file your income taxes for the 2018 tax year.