Daily SPAM Calls from Rewardsco

This company ( Rewardsco ) apparently runs the vodacom upgrade line. I have received hundreds of spam calls from this number every month over the last couple of months.

There is never anyone on the other end ( the call just dies when you answer it )

I have repeatedly asked vodacom to stop providing my number to these guys, ie to be put on a DNC list.

But both Vodacom and rewardsco couldn't care less it seems.