Horrific and underhanded service

I was subscribed to their products for 6 months i. e. 6 boxes of 30 tablets. This was a referral from a healthcare practitioner. I was advised to pay for 3 upfront in order to get a discount which I did. All of a sudden I am being told that actually the 3 boxes meant nothing and therefore I should either pay R850 after paying for 5 months or just I don't know fo what with three boxes which I will never need. I am so disgusted at this whole company and everything that has to do with it. I would never ever advise anyone to buy any of their products.