"Rude ableist blood test appointment receptionist "

Why is this lady receptionist (for blood appointments) believes she can rudely demand for me to walk all the way round their queuing system when 1) I am on crutches and obviously not well and explained it to her 2) finds it acceptable to raise her voice saying that’s the system 3) there was no one queuing at the time and she thinks I can stand there in pain having to hear her rude and loud complaints as I am standing in pain 4) refuses to give me my blood test form until I hear her insults. That is pure ableism and discrimination. If I would come with my wheelchair, it wouldn’t fit in their queuing system so I can’t have by blood test taken?