Bershka Cancels My Order Every Time Unless the Product Is Expensive

I'm so tired of this brand that I can't even begin to express it. I'm completely fed up, do you understand? Every single order ends up the same way. I buy something excitedly, and then I'm told it's canceled. If you're going to cancel every order, why are you even in business in this country? When it comes to expensive products, they never seem to get canceled (I know this firsthand from my friends), but if something is discounted, it never reaches the buyer, for whatever reason. I'm done with this—either fix the situation, or I'll be forced to take legal action. Note: I have more canceled orders, but I haven't included them all here. If necessary, I can provide those too. At the very least, explain why my order was canceled.