You know I have tried that and boy does she get a dry attitude WHEN i do decide to call her back. My husband thinks I am being mean, but boy oh boy she gets on my nerves. I have been to the doctor and he said if I didn't get a grip on it it could have my body in a permanent kink and he would not be able to get it out.
Yes, that is a lot ,but how many times do you see her in a year? Write her a actual letter of what you would like for her to do and why.
How about not answering the phone to her more than once a day? Unless of course she'll panic that you've died and come rushing round, a few days of not answering her every call may get the message across