What I am not seeing is discrimination. What I see is that the hotel manager thought you complained too much -- about no one at the desk, the elevator not working.... You wrote that it was a busy weekend and that may made people short tempered.Yes I believe it is franchised as well but the management company, not IHG has offered most of the already stated accommodations. The front desk manager is instead running the place like it is her own bed and breakfast. They have to uphold certain hopitalities to uphold the IHG logo and retaliations and descrimination do not fit with the company inwhich I have brand loyalty.
I am confused about something -- upon check in you wanted a discount? "From being promised a price adjustment at check in".... was the elevator broken and that was the problem? Is that the $40 dollars?
And you seem not to understand the nature of elevator repairs:
My initial complaint about the elevator was ignored. It was out for 6 hours
Elevator repair people are highly regulated and licensed, -- it is not the same as getting a handyman to fix something, like a minor plumbing problem. You seem upset still that it took 6 hours. I do not like hauling my luggage up stairs at all, and I have not been happy when the elevator has gone out at my building and I am on a higher floor -- as in more stairs to climb than the average Holiday Inn Express. Sometimes in life one has to improvise; I understand that the stairs were not good for your elderly relative, well then one has to meet in a more accessible place. You say you made plans based on an elevator being there -- well the same can be said for any coop, condo or rental -- that amenity was part of the package in chosing to live there -- and certainly an elevator building costs more than a walk-up.
Now I have no idea how franchise hotels work, or even how much power the regional manager has over the general manager when it comes to individual guests. It seems that the individual hotel can decline a reservation. No that may be an issue for the corporation to works out with the franchise. Can the hotel overrule the corporate office? It appears so. And have done so.
At this point it is not certain that the front desk manager was the one to say no to future reservations; but someone at the hotel with enough power has decided that they do not want you as a guest. May I ask what is your desired resolution? Perhaps ask for points equivalent to the discount?