Telkom
Doesnt allow you to opt out

I have been called twice in 7 days by Telkom and have previously told Telkom (probably 5 times) to remove me from their database. I am deregistered from the DMASA, yet, I am still getting spammed by Telkom trying to sell me stuff.

I have no way to COMPLETELY opt out.

Seriously, how many times do you need to tell them "STOP SPAMMING ME?! "