International Messaging.

I am pushed from store to store over international messaging

I purchased a new phone on telkom contract in March, now it is May and my Facetime and Imessage will not activate with my cell number. I have called the contact center they said I should go to the store, I go to the Mall of Africa store to confirm that international messaging is allowed on my line and they say their system does not show the option and that I should go to the Istore. I go to the Istore and they say it is a Telkom issue, now more than 2 months later, I am not getting any help, how do I get help?