Edits API is not working so well

I implemented Edits API in C#, however, it is not working so well. Maybe it is because it uses a different model, instead pf text-davinci-003 it uses text-davinci-edit-001. Some simple sentences like “She run fast” takes very long time to complete and the results is dozens and dozens of lines with the same result “She runs fast”. BTW, attempt of using text-davinci-003 returns “No Found” - not very informative, is it?