Being told to pay the group before they will release my profile?

[MsVictoriaXXX]

Hi, I recently joined a group Fifty Shades of Heaven on adultwork and got my £100 bonus for signing up. I make okish money but pay hasnt seemed right since joining, I asked politely to leave and they politely replied but they have asked for £100 back now, is this normal to pay a group manager to have your profile back? They say I didnt stay long enough to keep it but its been a few weeks. Is the profile not mine anymore? Should I just pay up and forget about it?