We stopped flying BA about 8 years ago. I do remember that on three consecutive single sector trips they lost my son's pushchair.
The second time it happened, when we gave the lady our address for it to be delivered, it turned out that she lived round the corner from us. She took it upon herself to drive round, after her duty finished, with one from her own household which she lent us until ours arrived. I wrote to BA as I wanted her thoughtfulness and kindness to be on record. I never even got a reply.
Unfortunately the other two events were handled with a total lack of interest and sympathy.