Can I give an N9

Hi,

So I signed this lease a couple months ago. I decided to move to a different place now with more space.

My landlord has his daughter deal with the communication. I reached out the other day asking to assign my tenancy to a new tenant. That I had a prospect tenant and would like to speak about next steps.

I spoke to her on the phone and she mentioned it would be hard since it was hard to find me as a tenant etc which is odd since I have a tenant interested.

She emailed me today saying she hopes I understood that they had to pay an agent a month of lease for my 1 year contract basically saying no and ended it with on behalf of the owner.

From reading online it seems a refusal for a general lease transfer would allow for a N9 but just wanted to ask if that email is all I need?

Would I just submit it for 30 days from now, leaving end of Sept and they keep my last months deposit?