Max Factor lip pencils unable to sharpen

I have tried to contact Max FActor (cosmetic company via FAcebook) they did respond and said they would get back to me, well that was a month ago, still waiting. They sell lip pencils and gave away a free sharpener with the purchase in December, but the pencil sharpener does not sharpen the pencil as the pencil is too thick, I have bought 7 sharpeners and none of them can sharpen this pencil without destroying the pencil itself, they are useless really and the most expensive lip pencil available and exclusive to Clicks, but the reason I buy this pencil is because it is exactly the colour I want