A1: Contact your congressman for help. (LK) 1/4/19
A2: Hi. I'm a disabled veteran & my wife has CHAMPVA, too. Fortunately, we haven't had to use it, so I don't know the answer to your problem. But, if I had your experiences, I would appeal to my representative in Congress. Even though it's not a state, Puerto Rico Does have a a Congress person.
Perhaps you've already tried this. If not, I am encouraging you to send a letter explaining everything, along with copies of your bills for the medical work, the letters & forms you've sent to ChampVA, any letters you've received about the bills still not being paid, etc. You said that your problem stands more than one medical problem, so be sure to separate the info into separate piles (perhaps even making the copies of each case using different light-color paper so that it will be clear what info is for what incident). I imagine it's very frustrating, but don't give up. If appealing for help to your Congress people doesn't work, send the same info to Pres Trump, both the House & the Senant Armed Services Committees, and any other Committee that oversees the VA. Also, ask for help from the various military-service organizations, like the DAV (Disabled American Veterans), the American Legion, etc., also chk the internet for other, new organizations that claim to help veterans. Good luck! (BE) 1/4/19