Customer Service Themed Crossword (HARD!)

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Across
  1. 4. support me... but not in the trees (6)
  2. 8. Intensify the late case, rearranged (8)
  3. 11. Answers formed by reformed unions, combined with others (9)
  4. 13. your right wrist hides a secret message – red alert! (8)
  5. 14. Back up and carry protection (7)
  6. 16. Poets settle the matter in a clever verse, oddly (7)
  7. 17. the existence of a supreme being and in the immortality of the soul (12)
  8. 20. Calm endurance or patients in a hospital? (8)
Down
  1. 1. Male in distress sent through the internet (5)
  2. 2. a game of pool is lost without it? (5)
  3. 3. Quiet virtue found in insect breaking into pie (8)
  4. 5. a promise you’re sure of? (6)
  5. 6. Settle an issue or re-solve it? (7)
  6. 7. Caught conversation in spider's home? (7)
  7. 9. Person purchasing a case of mustard, oddly mixed (8)
  8. 10. To better, and prove I’m ready (7)
  9. 12. Aid provided, though not in a case (10)
  10. 15. Set on fire in a confused tinge (6)
  11. 18. Retuned to you in a fun red mess (6)
  12. 19. Path altered to show understanding (7)