Ethiopian Airlines — unethical behavior

I travelled on 19th july with my aged mother (75 years old) from delhi to addis ababa (Et 0687) and connecting onwards to nairobi (Et 0302). Then on 30th july return from nairobi to addis ababa (Et 0307) and connecting onwards to delhi (Et 0686).
I had requested for a wheel chair right up to the plane (Including lift) for my mother as she has difficulty in walking and difficulty in taking stairs. Inspite of repeated reminders no wheelchairs was provided except in two instances out of eight. Addis ababa was the worst as escalators are not working and in coming flight lands late and one is hurrying to take a connecting flight.
It was quite tramatic for my mother as she aggravated the pain in her knee and the foot. For the 10 days in kenya she was in constant pain. On the return flight again the same ordeal. Now in delhi she is seeing a orthopedic surgeon and getting physiotherapy done, all because a simple courtesy of a wheelchair was not extended by ethiopian airlines.
I certainly will not be flying ethiopian airlines again and i urge all flying with aged parents to avoid this airlines