My antifreez is disappearing.

I was losing anti freeze about every day. I
have had head gaskets replaced, spark
plugs, hoses, the reservoir cap, and now just
the radiator after having a pressure test
done. They said if it was an internal leak the
pressure would have dropped, or something
like that so said it was a blocked radiator
and it was evaporating. Well that's been
fixed, and after two days it's low after being
completely full Saturday.