If you don't like the Board's decision, you can appeal to the Commonwealth Court. Send your appeal to the Prothonotary in Harrisburg, PA, within 30 days of when the Board sent their decision. If you have any question, you can call 717-255-1650 for help.
You can also ask the UC Board of Review to look at your case again. Send your request to the Appeals Administrator in Harrisburg, PA, within 15 days of when the decision was mailed. They don't usually change their mind, and they won't take new evidence unless you couldn't give it before. Remember, asking for reconsideration from the Board doesn't give you more time to appeal to the Commonwealth Court.