ball hit bat twice

[southump]

I was b.u. today. the batter bunts, ball rebounds off the the ground and hits bat. my partner called batter out, since he hitted ball twice. no protests, when inning was over i aproach him and said ball hitted bat, no batter intent so since it went into fair territory it was fair.
Is it a fair, out on the batter or a dead ball?. would like to hear your Oppinions. thank you.