FRUSTRATED,ANGRY,ANNOYED with the service at Bankmed...😡

I am so frustrated, annoyed with Bankmed. Since the admin staff has been changed 2019,they changed my plan from comprehensive to core saver. I asked them for proof that i changed it and signed for that change, still waiting for them to come back to me on that matter. Since they made the MESS I am struggling with a dentist to take out my sons tooth under anesthetic. I have been calling them, following up, every person that i spoke to said they'll call me back up until today waiting for somebody to call me. Can an investigation take 3 years???? Why would I be so dumb to change my plan to this stupid plan? I want to cancel my medical aid with them,because the 1 lady wanted to make as if its my fault that they changed my plan. I AM FED UP WITH THIS PEOPLE AT BANKMED.I told the guy I spoke to yesterday that if I don't hear from you by end of business yesterday,I will go to Ombudsman and Hello Peter.