Fnb. Bad customer service.

Bad bad bad. I withdrew money from an Absa atm but did not receive the money. As I am an Fnb customer i had to fill a claim form at Fnb. Its been 3 weeks. No correspondence no reply from Fnb. Everytime I contact the call centre they give me another number no one can tell me what the status of my claim is. When I go to the branch they also contact the call centre with no success. Useless.