Virgin Active confused

Today I got a call from virgin active that I owe them R129 and that my membership is blocked. Yet you debited my premium, then refunded me 129 and now you want to hound me for money you gave back to me. What the hell? I'm not happy with the service I've been receiving. My husband is i. Vitality , has always been yet you debit full memebership fees for 2 months.