Three days have passed but no call for assessment invitation

Good day I received an SMS last week informing me that I will get a call in the next three days inviting me to an assessment. Three days have passed and nobody has called me. Capitec positions in East London are very rare and my worry is that I will get called when the position no longer exists just to tell me that I will be considered in the next recruitment round. It is such a mission to get responses for job applications and if you miss a call from Capitec, they never call you back and the number can't be called back either. Working for Capitec Bank is what I have always wanted but now I am very disappointed. Nothing is going as it should. I feel rejected even before I get a chance to prove myself.