Is it legal to take CV help?

I have heard that people take professional CV writing help to get the best output of their job search. I am willing to go for best cv writing services in dubai, but I am afraid if it is legal or not? Has anyone here ever taken this kind of help from professional CV or resume makers online? Please let me know is it is right or not and if it is legal do let me know the procedures and the professional websites to get help from.