Incorrect debit order amount

so they debited me the wrong amount for the month december for both myself and my daughter ,I called them in first week of jan they ask me to link my new vitality and they will fix it I have provided my sales consultant at Gym with my details end of jan they debit me again i called spoke to siphokazi she promise to refund and i should open new membership .I went to the gym nothing is done we called head office they promised it will be done yesterday until now nothing is done i really feel this is not fair \