Lost our baggage twice!

We took an Ethiolian airlines flight to canada and back to SA. They never put our luggage on the plain and end op on holiday with a 4 month old baby with no formula and clothes for my kids. On the flights we spesifically ask for bulk head seats on our booking 5 months in advance and had to fight each and every flight to get seating changed. It was an overall horrible experience. Still waiting to get refunded from the last carrier for delayed bags.