Very disappointing, breaking of promise given.

These two lovely ladies made an effort to assist me when my problem arose. I had lost my confidence in FNB after my complaints were not handled, but after talking to them, I felt re-assured that something will be done about my complaint. However, once again FNB has made empty promises to me. They promised an investigation will be done and I will be informed by last week Friday about how the error happened on their side. This did not materialise so I sent them two emails to remind them, which they didn't respond to. I was sent a statement which showed an unauthorised withdrawal from my account for R2150.39 which I queried. They failed to get back to me despite many attempts by me to get an answer from them. No technician called me, yet they promised someone would do so about my In Contact app. No one could explain to me what the withdrawal of 2150.30 was for. I feel cheated and disappointed because I was beginning to trust them and unfortunately with all my queries, they are unable to assist or get someone else to assist me. Melinda and Samantha why did you let me down? I don't like complaining on Hellopeter, but you don't want to answer my emails so I have no choice.