Worst cheese ever- so much for brand loyalty shows me that anyone could make a mistake

Dear Parmalat, I need to complain about something. I don't usually do this I am a very loyal client buying cheese and yoghurt on a daily basis as I entrust brand loyalty to your company. I am sitting with 2 blocks of 850g cheese that is tasting very funny almost sour but the best before date is only in February 2021. I buy 2 blocks per week never experienced any problems it is a first for me. I only opened the cheese tonight I bought them yesterday for R109.99 per block even though other cheeses are on special I always buy only parmalat but there is seriously something wrong and ehat a waste of R220 this was. I bought the cheese to make Christmas dishes wish I won't be able to do now. I am so disappointed as I know quality control should be a priority but this cheese is horrible.