Pick n Pays sourmilk

I recently complained about milk that went off before its due date, Pick n Pay said they would provide me with a voucher.. I had communicated to Pick n pay, telephonically and on hello peter that ATLEAST 2 of the 6 were off, and that I hadnt continued to open the rest of the 6 pack, I simply called in to query this...

the reason for my complaint today is that pick n pay sent me voucher for R12? R12??? is this a joke? if I complain about ATLEAST 2 of 6 are off, surely you would reimburse me for 2? and no less? even though personally I feel replacing the whole 6 pack would be most ideal

Your service is terrible, instore and after sales service. it sucks.