Onside Kick

[BigGref]

Here's a stitch I had last season that I was wondering about, before I found this forum.

I'm HL, team A is kicking off to B, they usually do that, A attempts an onside kick. It only goes about 6-7 yards, when A1 inadvertently pushes B1 into the ball (from the side), who had previously not attempted to recover the ball. Then B1 comes very close, possibly even did touch the ball. Team A recovers it about 7-8 yards from A's free kick line.

Since I could not determine for sure that he did touch the ball, and the fact that he was blocked into it if it had indeed touched him, I gave the ball to B (forgetting about the Illegal touch b4 10 yrds)

Is the "blocked into the ball" part of the play legal, illegal, etc. FED rules.

Thanks ahead of time!