If your train is cancelled or delayed, you may be entitled to compensation. For more information on when you may be entitled to compensation, visit their Punctual Commitment page. 

You can make a claim directly with Renfe by using their contact form (only available in Spanish). Please include as much information about your journey as possible, such as your booking reference, train number, what happened, and whether any additional expenses were incurred as a result of the delay or cancellation.