How do I claim my Merlin rewards?

Excuse me, could you kindly elaborate on the process for claiming my Merlin rewards? I've been a loyal user and have accumulated quite a few rewards, but I'm unsure of the specific steps to follow in order to redeem them. Would it involve navigating through a specific platform or interface? Are there any prerequisites or conditions that need to be met before I can make a claim? Additionally, is there a time limit associated with claiming these rewards, and if so, what is it? Your guidance on this matter would be greatly appreciated.