contact on the "off" hand/arm - what's the call?

[MrPlywood]

Can someone enlighten me concerning contact on the "off" hand/arm while shooting? Or dribbling for that matter. I cannot get a call in my league or for sure not during my non-ref'd games. I'm a smaller guy, and everyone goes for the block when I'm driving. I'm fast enough to usually avoid getting hit on the shooting arm, but I get plenty of contact on the off-hand/arm which, since I'm a smaller player, can and does throw me off-balance and influence my shot. I consider it a foul, but I rarely win that battle unless I'm taken to the floor.

Thanks in advance...