Re: Hay you not
I think, in the stand alone context of the sentence as written, that there are three people involved here. The speaker, the one who has given permission to approach Ram, and Ram. It sounds as though the sentence is then needed because the one who gave permission initially to make the approach has either changed their mind about it, or forgotten that they have given permission.
Example scenario:
A = speaker
B = permission giver
Ram = Ram
A: "Do I have your permission to contact Ram to discuss how to resolve this problem?"
B: "Of course, but let me know the outcome."
A then contacts Ram to discuss
Next day:
A: "Ram says we probably need to completely restructure the project in order to make it work."
B: "Why were you speaking to him, it's none of his business?"
A: "Had you not permitted me, I would not have approached Ram [in the first place]."
Where I work character A would be more likely to say, "But yesterday you gave me permission to speak to him". The "Had you not permitted..." sentence may be more appropriate in a more formal workplace.