A position, that I worked to show it should a full-time role, was given to someone else. Is there anything that I can do?

One if my job duties was moved to a full time position. It had never been full-time before, but I worked hard to show that it was a full time position. I have work that role for 8 months. Received an award for the work, was told I was fantastic. I applied for the new post and it was given to someone else.
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