Unresolved credit

Unresolved credit on flight. This ongoing dispute refers to Flight Centre HO only and not the friendly staff at any of the Flight Centre branches I have dealt with over the years. I had a return flight booked to Pemba Mozambique with Airlink which was cancelled by Airlink a day before Covid shutdown. Although promised that I would receive a credit for the return portion of the flight I have now battled for over 2 years with hundreds of calls and emails between myself and Melissa from Flight Centre Balito which has in the meantime closed and then reopened a year later. Malissa no longer working for Flight Centre Balito. I am no closer to resolution.