The families of the Germanwings victims want an apology from the airline's parent company Lufthansa for allegedly dismissing their sufferings since the accident happened last March.

The relatives of the victims who were killed in the plane crash aired their disappointment towards Lufthansa CEO Carsten Spohr through a letter. According to them, Spohr's lack of effort to communicate with them caused their outrage, reports Independent.ie

The letter came from the relatives of the 18 students and teachers from the same school who were killed together with 132 others when their Airbus 320 crashed into the French Alps.

"We had expected to hear an apology from Lufthansa at some point in these difficult days," the families wrote, according to the newspaper Bild.

Even the €100,000 (109545.00 USD) compensation offered by Lufthansa, caused them to be upset. The amount varies depending on the family's size.

"What you offered us parents in recognition of our suffering is simply unacceptable," the relatives wrote. "To measure the life of each of our children and our pain at €45,000 (492952.50 USD) is deeply offensive to us, and above all to our children"

CEO Spohr has also not responded to the families' invitation to attend the funerals of the victims who died during the crash.

"Parents who personally invited you to the funeral of their child did not even get a response from you." 

On July 24, more than 300 grieving relatives conducted a memorial ceremony in the small town of Le Vernet, France for the 150 victims of the Germanwings crash, reports Deutsche Welle. On Thursday night, a separate ceremony was held to bury the remains of the victims who were not identified.

All the families who went to the ceremony was reportedly transported by Lufthansa from Düsseldorf and Barcelona.

The Telegraph previously reported that investigators believe Andreas Lubitz, the co-pilot of the Germanwings Flight 9525, deliberately crashed the plane on March after locking Captain Patrick Sondenheimer out of the cockpit when Sondenheimer went out briefly to go to the toilet.

The report further said that Lubitz had a history of mental illness and has sought the help of different doctors for another problem.

Families of the Germanwings plane crash victims seek apology from Lufthansa CEO Carsten Spohr for his alleged lack of concern towards their sufferings. Recently, the relatives held a ceremony in Le Vernet, France to commemorate their loved ones.