Nestlé poor customer service!!!

This is the 3rd time that Nestlé has a shortage of Nan A.R. & my baby is only 10 months old. I messaged them & was informed to supply my address for them to check which store nearby has the formula & I never heard anything after. I messaged again as my baby is on his last tin & I don't know what to do thereafter. How does a huge company like this run out of an essential, specialised item like this?! I have tried everywhere in Durban & even checked Joburg to no avail. I am quite disappointed with the lack of communication from Nestlé & the poor service. The fact that there is no accountability to this very serious problem reflects a complete disregard for consumers & their needs. How do you substitute formula for a baby???