Moulinex Customer Service Ignores My Calls for a Spare Part

The adjustment knob on my Moulinex QA1501 stand mixer broke, and I haven't been able to find a replacement part for it anywhere for about two years. Even though I am highly satisfied with the product itself, I cannot use the machine efficiently simply because of this one small broken piece.

I called the authorized service center, but no one answered the phone, so I have received absolutely no support regarding the procurement of this part. Being unable to access a simple spare part and not having a single representative to speak to has left me feeling incredibly frustrated and abandoned as a customer.

I demand that Moulinex supply the appropriate replacement adjustment knob for my QA1501 stand mixer and that a representative contacts me with a prompt resolution to this issue.