hi op
do you have any PRINT developer ?
now that you have removed 6 m of film
cut a clipping off, iIN THE DARK it doesn't need to be big ...
put the flm in your developing tank IN THE DARK put your print
( film developer is OK it will just take longer ) and shake & shake]
for about 3 minutes... pour out your couple of oz then stop then fix
( you don't need much ) and see what your film looks like,
hopefully it is clear, if not keep tugging at the roll and do another test...
its an expensive lesson but at least next time you will know not to open
anything except in total darkness ( and to read fine print, its there for a reason )
at least now you have free film to do your "fixer clip test" for a lifetime
good luck/