Dyson Airwrap Bluetooth Light Flashing — Still No Fix After Service Visit

I’d like to share a short story about my ongoing issue with Dyson. As of today, my problem still hasn’t been resolved. The reason I’ve been given is that the related product is currently out of stock.

Here’s what happened: I purchased a Dyson Airwrap. Since the color matching my straightener wasn’t available at MediaMarkt, I ordered it directly from Dyson’s official online store. I received the product and started using it. However, while styling my hair, if I turned the device off for a moment to adjust my hair by hand and then wanted to continue, the Bluetooth light would start flashing continuously, and the device wouldn’t work. After waiting for a while, I could restart it and continue.
I contacted customer service and showed them the issue during a video call. They confirmed that this behavior was problematic and asked me to send the device to the service center. I agreed. They told me to pack and send it with an additional narrow conical attachment, which I carefully wrapped and included in the box.

After some time, my device was returned to me with the message that no technical issue was found. However, the problem still persisted — the light keeps flashing, and I have to wait every time before it works again.
Worse, the narrow conical attachment was missing from the box when the device came back. I reached out again, and they claimed that there was no record of me sending that attachment, insisting that I hadn’t included it. I told them that I followed their representative’s directions exactly and asked them to listen to the recorded call.
They didn’t seem to believe me, so they arranged another video call to check the attachments I had. Later, they got back to me and said they would send the missing attachment — but it was out of stock, and they didn’t know when it would be available. They offered to send one in a different color, but I said I preferred the original. They told me to wait and call back later if it didn’t arrive.

It’s disappointing to experience this kind of treatment from such a large and reputable brand. I still don’t know when or how my issue will be resolved.
I have several Dyson products in my home — an air purifier, vacuum cleaner, floor washer, and hair straightener — but being treated this way over a missing conical attachment, and being implied to be dishonest, is unacceptable and not in line with Dyson’s image of valuing customer satisfaction.
When I mentioned that I would file a complaint, the representative’s condescending attitude made things even worse. It’s deeply upsetting.