Apria Healthcare Group – Sent to collections with no past due balance

My husband, with COPD & heart conditions, has been using oxygen since 7/2024. It has been difficult dealing with Apria. You get transferred and have to wait to talk to someone who usually can’t solve the problem.
Friday afternoon, 10/4/2024 I called billing regarding my current bill which says “This is the amount you owe $146.67. Please pay by 10/13/24.” “no Past Due Balance" Joan, in billing in the Oxnard office said I only owed $20.77. She took my credit card information and said there was no outstanding balance left on the account and gave me a confirmation number.
Then she said…."oh an amount of $133.62 was sent for collection in September." I said, the bill I have in front of me includes the $133.62 and says it is due by 10/13/24. She had no explanation about the discrepancy.
I’m very unhappy that my account was sent to a collection agency. It’s my understanding that a client has to be notified before that occurs.
I waited again to talk to a supervisor. Abraham B, who said he was a supervisor went on and on for another hour trying to explain how they could send a bill for an amount due several days hence and still have sent the
account to collection. He said he would pay the $133.62 with my credit
card that he had on file and that by Monday everything would be OK. I said I wanted something in writing and he said he couldn’t do that and he couldn’t notify the Collection agency. I asked for the name of his supervisor and he said he couldn’t give that out.