Damaged hair and scalp due to use of kadus shampoo

I recently purchased kadus shampoos and conditioners from Salon 500. Unfortunately though the advert says the shampoos are for dry hair I find my hair drying out more. I have emailed kadus..or wella .the company. They did send me an automated response to say they will contact me. But nobody contacted me yet.

I then went on to Salon 500 website and asked for help. Still nothing.

I made contact with the technical advisor who promised to meet me. And review. Subsequently she changed her mind and asked me to address it with Salon 500 as I purchased from them .

To date they keep saying they will let me know what's the way forward. I want to return all used and unused products for a full refund.

I bought these products in good faith but now I'm being given the run around. And my scalp is compromised.