Shocking Customer Service from BA (Israel)
I would have anticipated better treatment, even in Israel (my home country - for the avoidance of doubt).
At the very least I would have expected a reference to be made to the lady's condition, if not a full refund made on the basis that a woman with a medical condition was knowingly put under immense pressure.
It is unthinkable that a red-flag suddenly pops up in a booking that was made six months previously. When a carrier cancels a ticket, it is up to them to contact the holder of the ticket, morally of not legally. I would certainly be looking to press charges for misrepresentation and anguish (עגמת נפש).
Hope you get your just revenge on BA. This was certainly no way to treat any passenger - let alone a woman who is ill...