A Month Later, the Karcher RC 3 Robot Vacuum Is Still Not Fixed

I bought a Karcher RC 3 robot vacuum from the Media Markt store on November 11, 2023. Just a week later, it started speaking Chinese, couldn't update its app, and couldn't do quick mapping. The store said they would let me exchange it, but it turns out they didn't have the product in stock at any of their branches. Afterwards, they said they would give me a refund, but instead, they sent the item to be fixed under warranty, and I still haven't heard anything back. It's been more than a month, and I haven't been able to use the product at all.