Easily take your orders but no after sales communication

I don't usually give bad reviews, but this is the 2nd time this has happened to me. Last Monday I placed an order online for dog food and some other items. On the system it was illustrated to me that the expected delivery date was Thursday. Thursday came around and no delivery occurred. So I log in. To my surprise, I see the order hasn't been picked nor is it even in transit yet. Why? Because stock on the dog food was finished. The first time this occurred my WHOLE order (over R2,000) was held back for one small item out of stock. Both times, my dog food had run out. Both times nothing was communicated to me until I picked it up myself. Please communicate these matters to me in the future, I would then have time to make alternative arrangements, before it is too late, and I am left without dog food.

I emailed them to ask why this can't be communicated to me earlier, and they don't reply.

I have 2 giant Boerboels and I always use Pet Heaven for their needs. I support Pet Heaven with about R2,000 per month of business. Is this how we are to be treated?