Discovery is giving me the run around

I used to get my chronic heart medication from my GP without any co-payment whatsoever. Now I have divorced and moved houses and had to change my Pharmacy. Now it turns out that I have a co-payment of 20 %, because I did not use a Designated Service Provider. However my co-payment was close to 60%.<br> I have been in touch with Discovery and they keep giving me the run around.<br> <br> Can you please help. Every time a claim has been put forward the excuse for not paying in in full is that I did not use a DSP. Where did that come from. No hospital or pharmacy seems to be a DSP. Is this another way to increase profits st the expense of their customer.<br> <br> Can you please help me out