For finding funges in cold drink& might it affected on health

I drink regularly Thumbs up cold drinks,i have been bought Thumbsup 200 ml. glass bottle for me and two other guest people with me at from retail shop.after for ready to drinks or serve suddenly i have found hideous-ugly may be like Fungus etc in this bottle. i have awaked for what is this actual because i regularly drink Thumsup, Coca Cola company's representative also tell me that it is fungus in it. I have sickness and digestive problem Due to drink regularly thumsup and sickness and also stomach problem since from so many days, I have question that how I have problem for not becoming healthy, Thus I know my question and mental agony and financial loss. Subseqi tremble for just thinking About this what happening if I Would been drunk it or not ? I have been already complaint Coca Cola company for this but they response meaningless and company's representative talk with me like I am wrong and try to getting only money and talk rudely and with bad manner irrespectively. I want to take legal action and in under rules regulations with government or organising are made for customers for their rights and any thing for it had. So now what I have to do for upcoming process for taking legal action and filed case. Please give me legal advise before filed case and What details and mention in my complaint application petition discription and what points and things I have to use or not.