Are there any call blocking apps that prevent messages being left on voicemail? I'm happy with my Kaspersky security on my S3 but as I have my voicemail on, it means the callers can still leave messages.

I don't want to disable my voicemail altogether though so is there a way around this?

Voicemail is controlled by the network, not your phone so there's no way to do this without resorting to messy hacks and side effects.

I use 'Call Control'. Does the job perfectly, (free version limits you to 3 entries in your blacklist).

Link: https://play.google.com/store/apps/d...lcontrol&hl=en

And that stops the call going to voicemail?

I have used Call Blocker:

https://play.google.com/store/apps/d...eblocker&hl=en

It has an option to answer/immediate hangup, which is useful.

..without going to voicemail?

Yep, calls are blocked without going to voicemail