I'm not sure what you mean that you owe €400 "for the objective value of your property"? The ENFIA property tax didn't exist back in 2008 but there was a property tax on expensive properties. Are you saying that the objective value of your property is so high that you owe that form of property tax?
Alternatively, Greece uses a system of assumed income. Things you own, such as a property, a car, a swimming pool, a boat etc are used to calculate an assumed income. If you declare an actual income more than the assumed income you are taxed on your declared income. If you declare an actual income that is less than your assumed income then you are taxed on your assumed income. In the case of foreigners who are registered as non-tax resident in Greece, they are not declaring an actual income. In that case they have to prove, using pink slips, that they have brought sufficient money into Greece to at least meet their assumed income. Similarly if they acquire a new asset such as a property, car, boat etc they have to prove that they brought enough money into Greece to cover the cost of that asset. Are you saying that you didn't provide pink slips to cover the cost of your assumed income or the purchase of an asset?
PS You wouldn't be cut off for failing to pay one bill, John. You would be cut off shortly after failing to pay a third bill.