It might be helpful if you put some examples of your work online, because there are so many "I'll write your paper" services out there which don't actually do that but just provide people with one of the many thousands of papers which have been uploaded by people who scored well.
Not to mention that just because someone claims to be skilled at something it doesn't mean that they are, Dunning-Kruger and so on. Anyone can claim to have five PhDs and an MD (with genitals big enough to frighten people to boot), providing a sample is harder to fake and easier to detect if it is faked.