Unbeng or Unbeing: How To spell?

The word Unbeng is misspelled against Unbeing, an adjective meaning "Not existing."

Word contains consecutive vowels 'EI' in between alphabets unb & ng is misspelled as 'E' as letter 'I' is phonetically ignored
Wrong Spelling:  unb-e-ng 
Correct Spelling:  unb-ei-ng 
Explore spell check of Unbeing to spell without errors.