Purity Good Nights Head-to-toe Wash causing rash

I was using the Purity & Elizabeth Anne's Good Nights Head-to-toe Wash on my 8 month old little girl for over a month now. I decided to give it a try on my baby's hair. I initially loved that it was gentle on her skin, left a lovely lavender fragrance in her hair, softened her hair and slept well at night. I loved it so much that I went and bought three more bottles and was recommending the product to family. When I opened one of the three new bottles, the fragrance was different but I thought I might be mistaken. After a week of using the product on baby, she developed a terrible dark rash on the back on her neck which I am now treating. The new Good Nights Head-to-toe Wash actually smells like an ammonia cleaning product - like, Unilever's, Handy Andy actually. I am thoroughly disappointed with Tiger brands about this new batch of product and now have excess product that is harmful to my baby's skin. I feel that Tiger brands have skimped on ensuring that the baby products are mixed correctly and that every batch is just as good as the last. I am so disappointed and annoyed because now I had to spend on an expensive skin rash product that cost me over R300 to treat the rash.