I Tunes Code

I bought star trek with digital right before my divorce.  The code was still valid at the time.  I did try to use it but it had a symbol or letter that I could never find.  Then all my blurays and everything was put on hold til this messed up divorce was finalized because of problems..  Since this has happened, is it possible I could get a different code to actually use the digital copy.  This was the main reason I bought the dvd .  One of the letters looked like a capital L with a question mark hooked to the open side with the curve part half missing.  Also the last month I have been having problems with my dvd player and then with I tunes and their error messages  Can you please help.  i still have problems with my itunes account with codes loading from time to time  Betsy