to hear that you are having that level of difficulty. Do NOT be shy about requesting the assistance you need.

I hope this part here will not bore you or seem pedantic. There are actually 4 different codes the airlines use to indicate that wheelchair assistance is needed. They are:

WCHR - Passenger who can walk up and down stairs and move about in an aircraft cabin, but who requires a wheelchair or other means for movements between the aircraft and the terminal, in the terminal and between arrival and departure points on the city side of the terminal;

WCHS - Passenger who cannot walk up or down stairs, but who can move about in an aircraft cabin and requires a wheelchair to move between the aircraft and the terminal, in the terminal and between arrival and departure points on the city side of the terminal;

WCHP - Passenger with a disability of the lower limbs who has sufficient personal autonomy to take care of him/herself, but who requires assistance to embark or disembark and who can move about in an aircraft cabin only with the help of an on-board wheelchair; and

WCHC - Passenger who is completely immobile, who can move about only with the help of a wheelchair or any other means and who requires assistance at all times from arrival at the airport to seating in the aircraft or, if necessary, in a special seat fitted to his/her specific needs, the process being inverted at arrival.

These codes are put into fields in your PNR called SSRs [Special Service Request]. SSRs have to be entered according to the prescribed format code of the airline.

There are other fields called OSIs [Other Special Information]. These fields are free-flowing and the airline CSR can put anything at all in an OSI.

Were I you,I would NOT hesitate to make the extent of your need known to the airline CSR ["I need you to put in a SSR; I need you to enter an OSI"; etc]. Here is the reason -- if you put in the wrong SSR code, the airport employee may be assigned to help a second passenger because you only need "x" type of service. I hope that comes across as clear; I am a little tired.

And, just like you probably had planned, call back 2 or 3 times before your departure and make sure everything is set.