Wrongly debited/misled by their system..

Virgin active renders false services to consumers, i was misled by their system that said i can pay R360 for a premier membership which i did and later on they started debiting double that amount im now sitting with this issue since the 1st of March, i cannot access the gym because they blocked my membership for an amount i did not sign for and therefore i was advised to downgrade back to normal club membership of which i must still pay R245.00 for the downgrade which i don't find right and not willing to pay because all this is from their system , i made payment on my normal club price from the links that was sent to me and yet still head office cant sort this out because apparently the money went for arrears. I am truly not happy and prepared to cancel our family membership from virgin active and also take this further.