Worm in found in Woolworths Greek Salad

I found a big worm in my greek salad that I bought at Woolworths Menlyn Maine. I am so nausea and disgusted with the site of this big worm in my salad and the bad thing is that I only noticed the worm when I was almost done eating my salad and right at the bottom the big worm was lying. I am so disappointed in Woolworths....