Philips Mishandled My BRI953/01 IPL Device Warranty and Keeps Delaying Repairs

I sent the Philips brı953/01 IPL laser hair removal device I purchased from the Media Markt store to the service center under the 1+1 year extended warranty. However, there were serious errors in the process regarding the device. In the first shipment, the heads were mixed up and the wrong head was sent, and one head was returned without being repaired. Therefore, I had to send the product back under warranty again. During the intervening period, no repairs were made, nor was a proper solution provided. The service extended the process for another month on the grounds that “parts could not be obtained.” Currently, despite the product being under warranty for over two months, no result has been achieved. The product also has a 1+1 extra warranty. The device is going under warranty for the second time, and after 22 weeks, approval is again being requested on the grounds that “the part is not available.” My device has been waiting at the service center for weeks. On top of that, if I don't give my approval, I was offered a gift card worth half the price of the product. In my conversation with the call center, I firmly conveyed that I accepted this offer and that the process should be completed as soon as possible. Despite this, I was later misinformed via email that I had not accepted the offer, and the process is still unresolved. I feel like I'm just being stalled and not given accurate information. So, either I'm expected to accept this offer and keep quiet, or I'm expected to wait indefinitely. I think this process has been handled in a very disrespectful and indifferent manner, and I would not recommend it to anyone. I demand either a replacement for my product or a refund. I request that my grievance be resolved immediately.