I have been reading deadpool comics and see there are two voices in deadpool's head one white one yellow and somewhere along they completely despaired never mentioned again so who were they and where did they go

The voices came in outta nowhere in 2008. Daniel Way basically added them because he was lazy and didn't want to write any of Deadpool's side characters so he gave Deadpool the voices with no explanation where they came from. Then his series ended in 2012. We didn't get an explanation till a year later in 2013 where Ben Acker and Ben Blacker finally gave us an explanation in the Deadpool annual.

Basically Deadpool and Madcap were reduced to ashes by Thor's lightning before issue one of Daniel Way's ongoing series. Then both of their healing factors kicked in and they merged together into the Deadpool we got. The White voice is Madcap, the yellow voice is Deadpool's inner monologue. Then after Daniel Way's run ended, they were cut into two and one half grew back as Deadpool, the other half grew back as Madcap so they were separated.

I know it probably doesn't make much sense and there are tons of inconsistencies. But It's the only explanation we got. Blame Daniel Way for introducing the dang things with no explanation and then having other writers pick up his slack.

God and Satan?