Orbea website says you have a 50/34 crankset and 12-25 cassette. If you're having problems with the hills then (1) you're riding in to hard a gear or (2) you just need to ride more miles and build up your leg muscles.
What gear combination (front and rear) are you using to climb the hills?
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The Lord is merciful and gracious, slow to anger and abounding in steadfast love. - Psalm 103:8
I am a cyclist. I am not the fastest or the fittest. But I will get to where I'm going with a smile on my face.