Poor Service From SASSA

I am not even sure where to start. My younger sister changed her banking details for the R350 social grant, this happened last year August. Since last year August, she has not been getting the grant. She have wasted her airtime calling the customer care and wasted her time going to their office till today no assistance. What does she have to do in order for her to get her things sorted. Please assist, she can be called on +***4 for assistance and to get more details.