You are not allowed to file a new claim, this would be struck out for an abuse of process.
As it has been 2 months sadly you are out of time to appeal as that has to be done within 21 days.
If you said to the Judge that you would be out the country and filed a witness statement it can be considered on the papers.
If you failed to file a witness statement and failed to notify the Court and the other side that you would not be attending then the Court is quite right to strike out the claim.
The rules say you must notify the Court AND the other side of your non attendence.
Further you must have filed a witness statement.
If you did not do this, the claim ends and you can not do anything.
If you took these steps and the Judge struck it out you can ask for a re-determination.
But you must have taken the above steps.
Can I clarify anything for you about this today please?