iCloud

I have two phones on one icloud.
when I bought a new phone, automatically all the photos were uploaded.
old stood idle.
I turned off Iklaud there.
Yesterday, I connected Iklaud to make sure that all the photos and videos are already on the new phone and decided to delete all the information from the old iPhone.
Yesterday I deleted all photos and videos from my old phone so that
sell it.
in the morning I found out that everything was erased from the new phone too.
how to be
help me please.
there are photos of my friend who is not alive ... memory ... and in general all photos and videos are very important ...