Postal address does not match portal code

I am unable to register at Unisa because i get a message saying postal address does not match portal code.<br> I have checked through all my info many times and everything is correct. my student no. is ***5<br> <br> I have emailed Unisa 3 times and no response in the past 3 days. My father, mother and myself have tried to phone and there phones just ring with no answer.<br> <br> I have paid Varsity Collage already for lectures and if i cant come right at U94nisa and register then its another year of mine they have wasted!