Not been answered because either nobody knows or nobody cares - take the matter up with the vendor (the people you gave your money to).
Lids usually unscrew; nearly all anticlockwise - or lift up on hinges - some, like pressure cookers, rotate and lift. Are you using the right technique - enough force?
No need to get all steamed up about this problem on here - it's for freely given help not for consumer complaints. Elaine has been very patient.
Peccavi
November 2008