Bailiffs demanding entry?

ive just had blakes bailifs at the door saying i have too pay 300 pounds for council tax arrears from 2005 i have no memory of this bill he told me it was origanily 130 pounds but with cost it is now 300 what should i do i would want too refer it back to the council but he said i cant and he will be back for the money or he will take goods to the value i have had no warning fron them that they were going to come