No one is allowed to do your work for you it is illegal no matter what they say it will be plagiarised and failed.

the only companies i know of and that i used to only proofread and edit my work which is legal is grammarholic.com or studentproofraed.com

I also use to use these companies and i have lost alot of money. Now i do my work and get it proofread and edited my lowest marks are now 2.1 thanks to them.