Unisa send me my student number please

Hi I've been trying to apply with unisa since 2013 when I obtained my student number, I forgot to student student since 2013 I've been trying to apply after registering I will receive a message that I'm already a student. When I try to retrieve my student number I'd get a message that details not found. I've send numerous emails to mo avail. Please Hello peter can u help a sister out this has been going on for 6 years