APP SMS activation does not work!!!!!

I have been with Capitec for years now and I vowed I would never leave the bank because I thought the service was great, however now I have to reconsider. I am not currently in South Africa, I live abroad and had to change phones, I have been trying to download the new app on my new phone. I am on roaming with my registered sim card and for the life of me the SMS activation keeps failing to send, I have sent SMS's to other people in SA and my SMS's go through 100% of the time except for the Capitec SMS. I called the call center for assistance and the cheeky agent told me to "come home, if I want to use my money", I am appalled. Capitec is literary holding my money hostage and no one is willing to help me. Give me ways to access my money or send it back to me!!!!!!!!! This is disgusting service.