My husband sent home with no oxygen. His levels we...

My husband sent home with no oxygen. His levels were low all night. You call the physician s number you get another number to call for a different person. Their mailbox is full no way to leave a message. The dr calls in the morning on an unlisted cell phone number. I m not going to answer that when caring for my sick husband. She leaves a message please call me with any questions but leaves no number are they crazy ? What kind of follow up care is this? Agggh