Food Safety Reports: Sainsburys., Slough, UK

I bought two bottles of milk from there with an expiry date of 23rd October 2020.
My mother drank tge milk on 21st October 2020.
She is a visitor in UK.
Now she can't get even medical treatment as a visitor and milk expired 2 days before its expiry.  | Symptoms: Diarrhea, Vomiting