Well, "I" statements can be good, I hear, in effective communication, but I also heard it's good to link them with feeling words, to show that the problem is the feelings she's causing in you, rather than because you hate her or something.

Maybe try

"I like having my space, so when you call all the time, sometimes I feel like I'm being pestered, and I feel that you don't respect my boundaries. Maybe we could set a time to have coffee and talk then, and you can save up all your good stories for that time, because altho I like talking to you, I value my alone time too."

Most likely, as soon as she realises what's going on, she'll back off... the trick is not getting her offended.

As to the raspberry-killer neighbour, maybe talk to him as well and explain that you dislike people interfering with your plants on your property, or follow Cheri's suggestion of the wasp nest. I don't think you're wrong to feel the way you do about the plants, but if this was just a one-off incident it might make things smoother to just let it slide... but if it really still bothers you then I think you should talk to him.

Good luck! My pet azalea plant sends sympathy wishes...