Shaw's review: wic products

I have to go to Shaw's for wic considering I'm pregnant with no car and I have to take the bus with my son to get there. When I get to the store there is never enough items for wic so I have to sacrifice what they don't have because it is not in stock. When I talked to the manager she said the policy is that they cannot substitute . If that is the case then they need to make sure there is always WIC items in stock.