Can the defendant in a bounced cheque case file an appeal after 6 months?

Last year I had filed a civil case about a bounced cheque. The defendant was unresponsive to all notices issued via email, SMS and even newspaper.

The full process was followed after which a favorable judgment was granted to the performance order and an arrest warrant issued.

The defendant was finally arrested on a warrant which was related to a completely different case filed by someone else.

The judge granted him 30 days to settle dues but also released him without, it seems, any guarantees for reporting back. Of course, he did not pay and is now seemingly free and can not be located.

Now after 6 months the defendant has filed an appeal. My questions are:

1. Under the UAE law, isn’t the deadline for appeals supposed to be 15 days from judgment?

2. What could be the possible grounds to appeal a bounced cheque?

3. Is there any mechanism to have a warrant executed on priority - especially since the defendant did not fulfill the settlement commitments to the court?