Incorrect Billing not rectified

I changed my package to a branch family package for Durbanville Aurora Planet Fitness. I have made several calls to Call Centre as branch were not able to assist (or did not want to assist). Despite several undertakings from call centre that the correct amount of R 249 per month will go off, the incorrect amount has been deducted again. The call centre is not Planet Fitness staff and despite several attempts I have not been able to get hold of Planet Fitness staff to resolve the matter. No one comes back, only e-mails stating the matter has been resolved, whilst it is not the case. This is most probably what you call a faceless company service!!!!! Not optimistic that the matter will be addressed as I have been trying for close to three months!!!!