It is very unlikely that a station operator will see ypur post here.
You have to identify the station somehow. To do that you have to
figure out the language at least. Did it sound like an African
dialect? It could be Radio Nigeria. There are also Spanish or
Portugese speaking staions in Brazil on at this time. Check:
http://www.hfskeds.com/skeds/
One of these frequency lists might narrow it down a bit. Then once you
ID the station you could send them a reception report. Unless you know
some of the language they are speaking, this could be difficult.
Jim(MI)