You sound like a total idiot. First off why are you assuming that the toy dept. manager didn't do their job correctly? These days most merchandise at Walmart is ordered automatically through a computer system using perpetual inventory so it is not something the employees can order manually. If an item like a toy or video game system is in high demand then it will most likely sell out as soon as it hits the shelf. It will not come in again until they get their next truck. You know what an item can go out of stock in the warehouse too. If you had been smart about this and asked nicely the first time it was out of stock they might have been willing to put one on hold for you when the next shipment came in. But it sounds like instead you just wanted to throw a fit and bully someone over it. When they told you they wouldn't carry the product again until Christmas you should have let it go. They didn't do anything wrong by telling you this, they were just trying to give you some helpful information. Also it is the company's right to decide what they will carry in the store and when they will carry it. They are not obligated to sell you something just because they have sold it in the past and your child wants it. They are also not obligated to compensate you for making a trip to the store - which it sounds like you would have made anyway, since you brag about how much money you spend there.
What is really ridiculous is the way you called this "abuse" of a nine year old girl. It sounds like YOU are the one demonstrating abuse to your daughter by verbally abusing store employees and other customers. This customer even told you directly that YOU were the one making your daughter cry and you are so deep in denial that you will blame that person for speaking up to you and accuse them of abuse too. It sounds like you are stuck on the idea of abuse because deep down you know you are the one being abusive. And your behavior is setting a bad example for your child for many reasons. You are showing your child that material things and how much money you make are more important than treating people with respect. You are teaching your child to react to an ordinary, small disappointment as if it is a huge problem. Most of all you are teaching your child how to behave like a victim. I feel sorry for your child and feel sorry for the people who have to put up with you for a nurse too. No wonder the manager apologized to your child instead of you!