Jacob "wrestling" with his God or with an angel?

Am I right in saying that in the Jewish Torah Jacob is said to
have wrestled with his God whereas in the Christian Old Testament
it says he wrestled with an angel?

I believe the reference to Jacob “wrestling” with his God at night
means he negotiated with his God on behalf of all humans
in his (large, but not global) region, but over a period of
18 years, not just one night.

Now in scripture there is evidence for Jacob working for the
father of Rachel and Leah for 14 years, but is there any
evidence for the other 4 years?

Are there any references to Jacob in the Koran? If so,
does it mention the wrestling incident, and if so, does
it say with his God or with an angel?

-- 
https://www.nfld.com/~dalton/dtales.html Salmon on the Thorns (mystic page)
“And now the angry morning; Gives the early signs of warning; You must
face alone the plans you make; Decisions they will try to break" (S.McL.)