Vodacom
Vodacom not too bothered about customer security

I requested a block on an international number that is suspected as malicious.
I am receiving a lot of calls from this number: 2348126145130.
This is a Nigerian number that I have no knowledge of.
Vodacom customer care (sic) response is that I must use phone features if available to block the number.
There does not appear to be any interest in actually following up and/or providing a blocking service to protect customers.
Shame on you Vodacom!