Wait a sec: you booked a new flight with a code of a previously cancelled flight, and this new flight was cancelled again ?
Then you can INSIST on being re-booked on any flight at your convenience based on EU passenger rights:
If your flight is cancelled you have the right to reimbursement, re-routing or return, as well as the right to assistance and a right to compensation. Compensation is due if you were informed less than 14 days prior to the scheduled departure date. The airline has the obligation to prove if and when you were personally informed that the flight was cancelled. If this is not the case you can contact your national authority
for further assistance.