ER Consulting accounts department

ER Consulting accounts department has *********** staff. I have been fighting with them since November, but they did not believe me after sending relevant documents that the Medical aid paid in full for my consultation on 19 November. I have received threatening messages every single day. They have put me through so much stress and emotionally. After a long battle of phone calls and proof every day they finally sent the proof of payment on 7 January without an explanation or apology of their incompetence. Im not happy at all.