LAM Air Mozambique - Ghosting a family whilst grieving

My mother was due to fly to Mozambique on the 8th of October 2024. She became very ill and her Doctor advised her not to Fly to Mozambique, at the time I contacted LAM and informed them of this, they placed the ticket on hold for when Mom was able to use it. Mom passed away in December. On the 9th of January I reached out to LAM for a refund of the ticket. After countless emails back and forth (where I submitted all the requested documents). Suddenly LAM went quiet on me (29 Jan), not responding to any emails. Only when I reported this to various bodies (including CAA, ACSA etc) they responded on the 25th of February saying that in 10 business days the refund will be paid - its been 12 business days and I am still waiting for the refund and I am still waiting for a response on an email mentioning as much to them. I have always booked LAM (15+Years) for my mothers travels back and forth through her missionary journey in Mozambique and never have I experienced this type of service with them - its appalling and leaves a very bitter taste in my mouth, at a time when my focus should be on grieving the death of my mother.