Bauhaus Garden Umbrella Stuck in Warehouse With No Shipment

On June 27, 2027, I purchased a 2.70 cm garden umbrella through Bauhaus. My order number is 106912855093. Even though I've paid for it, my product shows as being in Arvato Lojistik's warehouse, but it's not being shipped and still hasn't reached me.
Despite calling customer service multiple times, I'm never given any concrete information beyond "we're waiting to hear back from the relevant department." I've been told that the Arvato representative isn't responding to the complaints customer service has filed, while Bauhaus is just monitoring the situation without taking action. Even though we're living in the age of technology, it's unacceptable that the only explanation I get is "we're waiting for information," with no clear answer as to where my product actually is.
I purchased this product from Bauhaus, and I paid Bauhaus for it. Any loss or disruption on the logistics company's end is Bauhaus's responsibility and their logistics partner's responsibility — not mine. As a customer, I don't want to spend days waiting for a package that "might arrive today," getting no clear information, and effectively being cheated out of my money.
For this reason, I'm requesting that my missing or unshipped garden umbrella be located immediately and sent to me, or, if it's out of stock, that a new product with the same specifications be shipped right away. If the product can't be provided, I want the amount I paid refunded to me in full and without delay, along with clear and transparent information about the situation.