Debit Order Disputes

So I've been trying to reverse a debit order on my account for the past 4 days, Each day i was told the system is down my main concern is that this is not some local shop on the Corner this is actually a bank I use and how can a system be down for 4 days how is priority measured?, I ask for a turn around time for this issue to be resolved and no one can give me any information, I then had another dispute which I logged previously and when I spoke with one of the agents they couldn't give me a status update but problem here is that i'm a premier FNB customer and still receive **** service, I literally cannot get any information from the agents at all. I think its time to move to a different bank as this cannot continue.