Vitality inefficient systems - Frustration - theft

This is my second review in the last 3mths related to the same query regarding the inefficient service i have received. Almost 6 mths ago I activated the gym benefit for my son. Virgin Active continued to charge me for the full amount based on the non authorisation from Vitality. After lots of calls it was corrected and i received a backdated refund. Its two months since the correction and to my surprise im getting charged the full amount again as Vitality has taken away the benefit. Im back to speaking to different agents with no return feedback. This is theft and Vitality has not fulfilled their obligation.