Dyson Cinetic Big Ball Absolute 2 Head Broke Again

I purchased a Dyson Cinetic Big Ball Absolute 2 vacuum cleaner and the main head broke 6 months after I bought the product. At that time Dyson provided a replacement. Now the head has broken again, even though it has not been 2 years since I bought the device in total. This time I was informed that the process has changed and that the head will not be replaced under warranty and that I have to buy a new one for a fee, and that this new head would be under 2‑year warranty. However, my current product is still within the 2‑year warranty period and I find it unacceptable that the same part, which has previously been replaced, is now excluded from free replacement. I request a free replacement of the broken head under the existing warranty conditions of my Dyson Cinetic Big Ball Absolute 2 and a written clarification of my warranty rights regarding this part.