BAD SERVICE AND INCREASE MONTHLY PREMIUMS

My Review is 2 fold - Continued Increase in monthly deductions, and lack of Customer Service. I am not sure if there is anyone else out there that is experienceing the same as i do - I pay my monthly Medical Aid premiums but every time i see a Dr my Medivault deductions increases, for example : This is the problem – why do I have to pay increase Medivault payments every month. August Medivault R100.00 September Medivault R333.00 October Medivault R 533.00 And this is besides the R3200.00 I have to pay for a single premium every month. I have been trying to call the Medical Aid but they cannot explain this to me. I am verys frustrated and I am too old now to change Medical Aids - I think this is why Fedhealth is behaving like this. And i an with Fedhealth more that 15 years. Please advise if this is normal Medical Aid practice