Finnair Staff Lies & cheated passenger

The annoucement for boarding was called and I was on the way for boarding, a Finnair staff (groud crew) approached me saying "wheeled" baggage is not allowed even though the weights & dimenions were within the limit. She took my baggage and transferred it to checked baggage with a receipt saying that Finnair is not responsible for the extra checked baggage. (Of course I am not aware of this condition since it was such a rush) I did ask how about the other passengers, she said she will remove all wheeled baggage, and no wheeled baggage allowed into cabin. Which is a lie, there is no such rules within Finnair airline. When I get on cabin, I found other passenger having wheeled baggage wihtin cabin and I asked the flight crew, they told me there is no such rules, there were lots of room (storage) for the hand carry baggage. I was cheated! Unfortunately, the "extra checked baggage" did not come together with the same flight, by the time the baggage shipped to me, the baggage was unlocked (lock removed) and of course valuable item lost. I wrote to Finnair, yet they did not response to the issue of their lies & miss-behaviour which caused the lost.