How soon do you respond and the best mode of communication? Plagiarism free and what is the process of exchanging the document?

How do you maintain confidentiality of the paper?
Refund process if not satisfied with the work?
Plagiarism free and what is the process of exchanging the document?
How soon do you respond and the best mode of communication?
How many times Revision can be done?
Can have sample paper on the similar topic (if possible)?
Price for Proof reading
Can you include Interviews/surveys as a part of Findings?