What to do when there are no ideas for writing text?

Hi, I'm studying at the university. We were asked to write an essay. I sit and do not know what to do and who to turn to. I can't write it myself. I tried many times, the grades were bad. Now I am thinking of asking for help and hire a dissertation writer. But I don’t know who to turn to. I would like the quality to be good, the price is not expensive, and the guarantee. I'm worried about plagiarism. I asked colleagues, they do not know who to contact. What do you think ?