A man has been jailed for nine years over the vicious and unprovoked assault of a refugee at Wollongong railway station last October.

Timothy Williams, 26, from the Illawarra, pleaded guilty to aggravated robbery with wounding, admitting he and co-accused Jaimee Lee Haynes, 28, were behind the October 6 attack, in which the victim was punched multiple times before being robbed.

The refugee, who had arrived in Australia from his native Eritrea only five days earlier, required stitches in his left ear and lost a tooth in the ordeal.

The entire incident was captured on CCTV, a matter presiding judge Paul Conlon said provided the court with a reliable account of how the incident unfolded.