they are "high heels"
i don't know exactly why you are having trouble walking in them but i'm going to assume you have lost feeling in your feet and maybe also the legs.
you could try getting used to the shoes at home for short times, and then build up slowly to short trips away from home, and then finally a whole night out.
it takes a while to get back to everyday activities when your body doesn't work the same any more.
practise will force your body and brain to do whatever it can manage, to try to compensate...
do as much as you can, as long as you still feel safe