Their agent by the name of Masimange promised to call me back after making payment and I'm still waiting for his call back

Their agent by the name of Masimange promised to call me back after making payment and I'm still waiting for his call back . I needed to find out more regarding the delivery and what happens if I'm not at the address I gave them as I'm in between offices . He advised he would call me back at 14 :31 and he did not