Chinese spam calls

Hi. I'm being plagued by Chinese spam calls. I've tried everything I know to stop them except blocking all unknown numbers. Does anyone have any ideas how I can stop these nuisance calls? Thanks.

Unfortunately if your number has been passed to them via a leak etc that is best option block unknown.

You know, I thought as much. Thanks for taking the time to reply.

It can be a right pain to get these calls regularly Robbocop, I've found not answering them for a while tends to see them reduce but I get that's not always practical. We have some good tips for reducing unwanted calls over at the Lebara blog. Take a look and see if there is anything helpful there.