So i asked this question before but um it got worse?!?

i opened my hair dye awhile ago and i broke the seal to the actual dye bottle!! i bought it 6/22/11 and the hair dye in the bottle went from pink to purple... i need to know if its still ok or if i should get a different bottle... please please help me! this is the first time i dyed my hair an unnatural color. the brand is; 'SPLAT Pink Fetish"!!! thank you!