Technical Error

I joined discovery medical aid via a broker PSG Wealth. Added a new member(new born child) in July and the first new instalment was suppose to go off in August and was informed on Friday the 20th of Nov that the instalment did not go off due to a technical error on the billing system. The email stated that the amount would be taken off my October and Nov Salary prior no notice of such. When I was called about the incident as I sent them an email, i am told that either way I was entitled to pay the amount so it will be debited. I don't have a problem with paying it however with the level of service or rather response is that discovery is trying to recover their money not putting into consideration my financial obligations as no arrangement was done prior. If it means I have to take the matter forward to my advisors I will. I work in the service industry and such mistakes should be accounted for by the company and not the Client!!!!