Abbott — baby milk powder

We have purchased similac 500 gm milk powder can, and opened it just 2 weeks back, while we kept it in cool place, but today the product got torned up and fungas have been attracted by it, now the complete powder can is waste, moreover the chemist dont want to replace it

This is worst ever experince and due this issue i will never go with similac product and will try some other brand, i hope you understand the matter and help me regarding this issue
Thanks
Himanshu.