In recent years, as a PhD student in West Africa, I have helped several undergraduate and PhD students who were stuck with some particular problems to the point where they were barely to leave (I can't go into more details for obvious reasons). Sometimes, I had to spend weeks with their particular problems at the expenses of my own work. However, every time one submits his/her Master thesis / publish an article they never include me in acknowledgements but I never told them to do so because I thought that's obvious. Or maybe because I don't like to appear like an arrogant/rude person.
Now, I know this behaviour will never stop. How can I ask for credit whenever I help someone; should I ask him before or after helping him/her?
Some of the PhD student have finished and working as post-docs in Europe. I didn't finish my PhD yet for several reasons: because I have a very toxic advisor. Now I am fighting with huge depression, what next?
Thank you