Hint #1: every symbol is an individual character. You don't combine two or more symbols to form a single letter

Hint #2: (confirmation of what you may have deduced from hint #1) the final deciphered message contains no numbers

Hint #3: / separates letters, _ are spaces (yes, there are two symbols for some letters. Hint #1 still stands!)

Hint #4: As hinted by hint #3 and hint #1, each symbol translates to a number

Hint #5: This is a double-substitution cipher. Apply hint #2 to the cipher you learned in hint #4 to figure out the second cipher