Just push the worm of a corkscrew opener through the wax and turn it into the cork, just as you would do when opening a bottle without wax. Then use the lever of the opener to pull the cork out, this will cleanly break the top of the wax seal.
Just push the worm of a corkscrew opener through the wax and turn it into the cork, just as you would do when opening a bottle without wax. Then use the lever of the opener to pull the cork out, this will cleanly break the top of the wax seal.