If it is part of the common property then you are not permitted to park there and the by-laws would set that out.
If it is part of your unit that you are renting there is nothing that she can do as you have a right to use it as you wish.
You need to ask fro a copy of the Strata Plan to work out who is the owner of the land.
I am unable to get a copy as I do not have any authority but you as the tenant have the right to get access.
You need the plan. I suspect there is no easement it is just common property and all unit holders, tenants and owners have a right to use it and cannot block others from using it.
I completely understand your frustration and I would suggest that send her a letter, and advise that she no longer bash on the door and in order to resolve the issues, you request a copy of the strata plan to ascertain all parties rights over the driveway.
You should be able to get a copy from the body corporate or the managing agent can arrange a copy.
If she continues to harass you may have to take out an intervention order.
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