SPAR BRAND ROTTEN FRESH MILK

Spar Birchgate!! I bought spar milk brand expiry date 04/12 yesterday ( Sunday ) it is Monday today , it is rotten . Tried calling ur number ***, & *** many times , no one answered!! My question is how many people have bought that rotten milk & u don’t answer ur calls ? Managers are always standing at the front , for what if u cannot take calls or is ur intention to kill as many people as u can ?