I did the same thing, luckily i only used one bottle over a few applications, for a quick fix. i then went to a salon for highlights after pay day, and they wouldnt touch my hair with a barge poll after i told them i had used Sun in. They said it was becasue the bleach they use, and many other hair dressers, reacts with Sun in, and my hair would snap. i went home in floods of tears and looking like a badger with terrible roots, my boyfriend found it highly funny which made things worse!! Apparently (not that you will ever use it, im sure) but Just for men has the same bad chemicals and can cause the same reaction, both products should be avoided. (& come with a warning label as the chemcials really are very harsh)
Anyway, there was a positive out come to my hair disaster...i went to two different salons, desperarte for a solution, and asked them to test my hair. they cut strands out where they would go unoticed, and put bleach on them. neither of their products reacted, and the tests were free. i chose the salon i trusted more, and they deep conditioned and high lighted my hair perfectly. it came out looking beautiful and glossy. this was some months ago, and I now have a whole head dye as it is easier, and havnt had any probems.
go speak to a salon and im sure they will be happy to help, but use a well respected and trustworthy one as you dont want them to say it was fine and can be sorted just to get your money. Granted i almost died when i went to pay for my hair treamtments after the sun in episode, it was not cheap...but most likely worth it.
hope this helps xx