Rangitane was renamed Anya Robyn in March 2013. Her owners are now listed as Magna Business Trading Ltd. The ship remains registered in Panama and is trading in the Mediterranean area.
The last movement noted for Anya Robyn on AIS Marine Traffic shows her sailing from Port of Spain anchorage on 7 July 2017 for an unknown destination.
Her current position (and she has been there for probably the last 3 years) has her moored near Georgetown, Guyana in position N06.95232/W58.477.
Looking at Google Maps you can actually see her at N06.9524/W58.4777 on the western side of Wakenaam Island on a branch of the Essequibo River sandwiched between two other vessels.