parmalat yogurt comaint

Bought some parmalat yogurts the ones that come in six packs 100g containers smooth yogurt many of the ones opened had a distinct soap taste from different six packs Called parmalat to enquire abd compain but I was informed that it is not their problem and the pbone call was ended from tbeir side three times which Is very rude as a starter. The lady at parmalat did not to give me her name or position