Terrible customer service with stale products

Good evening, in December 2018, i bought a 2kg box of biscuits which we only used 2 packs which is equivalent to a kg. So my husband andi decided to keep thee other two sealed packs for Easter as it only expire in May. So these biscuits have been stored in my grocery cupboards with all other items. So during the week to easter we opened a pack (500grams) which looked perfectly fine however was soft and stale when bitten, a total embarrassment. We however complained to bakers who requested pictures and expiry dates and so on, feedback has beeiln given from our side, and the consultant told me that there is nothing they can do about it has it hasn't left they side like this. Which is understandable but why are they giving us an expiry date so far and its product can't be kept up to standards? My problem is I lost out on 1kg of biscuits which i believed will be fine because it has a long shelf live and Bakers cannot keep up to their standards which has ****** me. Further more why are the packing in 500grams if it's still stale beforehand.