Hi Dave
I think what your saying is a practice that’s been used in retail ever since Adam sold an Apple to Eve and that’s to adverts for something as an unbelievable cheap bargain and when you turn up there’s no such thing.
Times I’ve been to Curry’s over the years to buy that fantastic cheap computer, washing machine, TV only to be told that they just sold the last one five minutes ago but we have another one here exactly the same specification but cost X amounts more. It’s what fishermen call baiting and we bite.
These things are annoying at the best of times but more so in these times and you have to deal with a disability as well.
Hope you find something soon.