Bad client service

On the 24/7/2015 I went to the Centurion branch to change my late father's marital status. The people at the branch said it will take 6 to 8 weeks. After 8 weeks nothing was still changed i log a inquire on the 21/9/2015 they said 5 working days I phoned and till today nothing has been done. I can't do my father's estate due to this. The people in the call center are not very helpful.