Pedro's Plumstead excludes items from the order

Good day, I bought from Pedro's a few times and each time there was an issue. My first purchase excluded the cooldrink. When I complained it was delivered the next day. My other order wasn't delivered to me at all after I paid for it. Next day again after I complained it was then delivered. My other 3 purchases excluded the juice from the kids meal. I can understand a mistake happening once. Not this many times. This is incompetency. Also how does the person pack everything except the juice. Surely there is someone checking the orders and packing so how does this happen unless its happening on purpose. Its also a kids meal so the child gets all disappointed and 3 times. I think the staff at Pedro's in Plumstead need training to be more competent. I would like feedback on this issue. Thanks