Dabur — Fungus like thing in real mixed fruit juice

Respected Sir/Madam,
This is to inform you that I have recently purchased a tetrapack of real mixed fruit juice from Big basket while emptying the pack I saw something coming out of the tetrapack along with the juice in it, on taking that out from the tetrapack i was shocked to see long fungus sort of thing.
Being the regular buyer of the real fruit juices this was the most disheartening experience,
Since we already drunked half the content of the tetrapack I am concerned about my and my family health,
It would be grateful of you if you please look into the matter and take the required action as soon as possible since it is about our health I won't tolerate any sort of negligence from your side.