Unrealiable!!!!!!

So its been almost 6 months i wrote a review about a bad experience about an unpaid claim due to no authorization being obtained i received a call from Fazilah after the review the same woman i spoke to about this claim she then advised me that her manager authorized for me to get a discount and only pay 50% of the claim and i could pay it over 3 months i agreed and advised her to send me an amended statment with this agreement she said she would and up to this day ive received nothing yet? The account might have been handed over already and i might not even know it this is really pathetic i am seriously disappointed in this because i Melomed was my go to hospital but that clearly needs to change this was my last review in May I attended trauma on the 18th of January 2019 and as I normally do when attending trauma I give my details to the receptionist at trauma and she would type in my details and give me an acknowledgement to sign this always works well or atleast worked well until now I received this sms (months later) The outstanding balance on your MELOMED GATESVILLE account nr ********** 4 is R1,168.67. Please settle on/before 21/05/2019. Fazlia ********** 950 3 months later stating that no authorisation was obtained??? I call and get told that I was supposed to obtain authorization when normally Melomed does it???? Why on this ocassion??? My son was at trauma on the 20th December 2018 and I followed the exact saw process I always follow this process no one told me to obtain authorization else I would have and then I only receive correspondence months later this is really pathetic!!!! I've been to trauma so many times and on this one occasion the receptionist fails to do her duties and I have to take responsibility pathetic I tell you!!!!! I've always bragged when my colleagues complained about Melomed I never had to go through that but clearly it was only a matter of time