u/Double_Lab_8303

On April 13th I had a flight (Lufthansa) from Dublin to Frankfurt that got cancelled on April 12th. There was not any flights available to replace the original flight on the 13th so I had to book a one way flight on the 12th going into cologne and get a hotel room + train ticket to Frankfurt. I ended up spending an extra 900 euros because of this incident. I had tried contacting Lufthansa 4 times with no luck and talking to gate agents they just told me to go online. What can I do about this? What can I get refunded? The original ticket? The one way ticket? The hotel? The train? Nothing?

Thanks for the help in advance!!