its not the 1st time!! 3rd time & I'm digusted

As I normally buy my sons 10boxes of infacare no2 for the month, opened the 1st box & there's no bladdy s**** it! Opened da 6th box already & finally got a s****! Isn't every box suppose 2have a s****? & its not the 1st time this happens! I buy his milk each month at spar in vangate mall but since I switch from no1 to no2 it has always been a s**** issue! The 1st time I switched I bought 4boxes, no s****! Had 2go 2da tuckshop 2buy another buy ,hoping there will be a s**** in, luckily there was, 4boxes , not even one s****? So sick of this! Everytime I buy, I have 2pray that there will be s****s in the boxes! !