Lincare Holdings  - oxygen supply delivery and calls for calls for needed supplies

On Numerous calls I specifically ask for my precise size cannulas, tubing, connectors, etcetera . Every delivery by mail has been incorrect more times than I can count. They are paid by my insurance company and take don't take back wrong supplies even though they are individually sealed that they incorrectly send. I have been on oxygen since 2006 and never had as many problems as I have had with them. I travel across the country to visit friends and family and need a company that is nation wide. This makes it difficult to change companies until I find another one that has offices throughout America.