Disgusting service - no service

I have been a patient of Vitalaire from Nov 2018. At first the service was amazing but over the last few years has become disgusting. I have rental concentrator with Vitalaire. Medical aid give 6 months cover at a time and Vitalaire nurse does a home visit and sends assessment to medical aid to carry on with cover. Never too much of a problem until now. I received expiry notice from medical aid effective 1 sept 2025 and the nurse only did visit on 16 Oct 2025. Should have sent assessment to medical aid to continue cover. Vitalaire never check to see that assessment is sent and that medical aid have received it. So Vitalaire have not received payment from September. I noticed this on checking medical aid statement in December. I have called Vitalaire a number of times from Jan 2026. I was told first that assessment had been sent and in a later call that it had not been sent. Called medical aid and they confirmed assessment not received and they would need a new assessment. Every time I called Vitalaire the said they would get the nurse (Steven I think) contact me for a home visit. My pulmonologist gave me his contacts number to call. She said she would look into it and call me back. I have not been able to get hold of her again and left messages every day. The nurse has not called me either. I rely on oxygen and do not know what to do now.