[Far far away ..]

I had a different play to the OP - but similar in terms of help being offered.

Tag play at 3rd base, ball coming in from left field and I got straight lined with the runners body (sliding) in between me and the low tag. I couldn't see contact and called safe.

F5 is less than impressed asks me to go for help - my partner doesn't have clear contact either and so the call stands.

Then the runner fesses up and says "he got me". At which point I said "well if you want to give yourself up ...." and so he abandoned the base and I called him out crossing into dead ball territory.

So I have a similar question - should I reverse a call on basis of runner admitting contact?