someone please explain to me what is going on?!

I posted about my "drama" with sleepy's and DD's mattress . After delivering wrong mattress 3x we finally got the one we wanted.
After the Sleepys experience we decided to go with Sears to get OUR mattress, they canceled on us 2 times , "delivered" and said "no one was home" 2 times and then finally delivered one day , a filthy and soaking wet mattress (it was a rainy day, I don't know what happened ...) so I sent them back and canceled the order.
Last month we purchased appliances from best buy, one of them a gas range broke within 1 week, the door separated from the frame and it was beeping every time I turned it on , I called BB and they said it's a "control panel issue".... So they offered to exchange it for another brand , a better one , that's also self cleaning -the other one was not- so I agreed, even though it meant not using the oven for almost 2 weeks , bc they couldn't deliver earlier....
They delivered today and it's a WRONG GAS RANGE! when I took everything off I realized that it's not self cleaning and it doesn't look anything like the one we were supposed to get . Best buy record and a receipt they gave us has a different model # on it, the gas range has a different one, I looked it up and it's a $400 stove , the one we were supposed to get is over $600, this is not self cleaning, the one we bought is self cleaning, this one is not stainless steel , it's silver mist....
Now I;m trying to reach the store, been on hold for 30 min and no answer yet. I am ready to drive over there and scream at them!

I just don't get it, what is going on? how do this stores keep making mistakes, canceling orders, delivering wrong, broken,dirty stuff.... what's happening?

Am I losing my mind? I feel like all I do lately is complain about stores , anyone else?