The bitter, middle-aged woman comment was out of order, but I can't blame @burberrygodess for fighting back with barbed comments, after several posters said she looks like she is 60! Amongst other rude and insulting comments (She is in only her 30s, and doesn't look 60 FGS! Nowhere near that!)
And someone said it's because of the 'old face droop' in her face. What the fuck is old face droop? I am in my late 50s and don't have any 'droop' in my face! And the OP doesn't either. What's more, you can only see a bit of her face. So the 'U look so OLD' comments are bullshit.
I don't understand why younger women have fillers personally, although the OP has explained why she does, but it's no-one's business if younger women do have fillers! (Or any age woman!)
If I were you OP, I would report your original post and ask Mumsnet to delete this thread. It's gone pear-shaped, people have turned nasty, and you do NOT look fucking 60! I am sorry (some) people have been so rude to you. 
I hope you get your filler issue sorted soon too. 