FlyerTalk Forums - wheelchair assistance between terminals ?

Hi,
My M-in-law requested wheelchair assistance when she arrived from BOM-LHR-BOS for her connection. The problem is that BOM-LHR arrived by BA in terminal 4, and she had to go to terminal 3 to get her connection via AA.

At terminal 4, they wheeled her to the bus and left her there. when the bus came, she had to climb up with other passensgers assistance who helped with her carryon also.
but when she arrived at term 3 - no one was there to help her to get to the gate.
one kind gentleman took pity on her and took her carry on - while she waddled along slowly for 1/2 mile or so (so she told me) to get to her gate. When she arrived at AA, she asked what happend to the wheelchair assistance she had requested. they said no one was there until 1 hr before flight - and then they said wheelchair will be provided to get her from her seat outside the gate to the plane. what a joke !!

Now, she has to make the return trip.. and I spoke to both airlines.. and they refuse to take any further responsibility to this situation - which i know is going to happen again - and say its my responsiblity to get her from one terminal to the other - (but i am in the US) or I should provide a companion for her.

Can anyone have a better situation ?
when did customer service between AA to BA deteriote so badly ?

Unfortunaltely, when i booked her non-refundable ticket, I didn't know that when i booked the ticket via AA, i didn't know that they would book her by AA for transatlantic and then by BA - and even when they did that, they didn't tell me that they are 2 diff terminals even when i requested wheelchair assistance.

any suggestions on how i can make her transfer on Sep 1st - from terminal 3 to terminal 4 more easier ?

thanks.