Cream sour or non-existent

I LOVE Seattle Coffee - even better when they introduced the 'Breve' to the menu which is made with pouring cream (perfect for those of us on a high fat diet). However, twice now the cream used was sour - which I only noticed once back at the office and then had to drive all the way back to get another coffee (incidentally without a single apology ever muttered). Now there is just no cream available anymore - yet the shop Fresh Stop in which the Seattle is housed has cream falling off its shelves. Yesterday I ordered a 'Breve', told there was no cream (after about 5 minutes of waiting already) and actually PURCHASED a tub of cream for the Seattle shop. About half of it was poured into my coffee (well, mine and a colleagues) and the rest was kept by the Barrista. No discount on the 'Breve' I had already paid for.