Unhappy client

I cringe whenever i have to use this medical aid, ive emailed my invoice no feedback, no payment no response whatsoever. I was given a prescription for HPV vaccine, told the medical does not pay for vaccines. Went to my regular doctor, told the doctor was not nominted however when i asked them to go back to my application suddenly the response is that they dont know what happened. Its a nightmare dealing with the call centre agents. I dread the thought of dealing with this scheme again, especialy knowing I will have to phone them soon after my hospitalisation bcoz i know there will be unpaid bills.