Unauthorized debit orders

I have a smart account with FNB, I use to have a Premiere banking account which I downgraded due to bad service and no benefit. Every month I have unauthorized debit orders on my account, the first time I asked the bank what the debit order was for as it was unauthorized and they referred me to the service provider. The call center agent never even advised for me to dispute the debit order via the electronic banking platform. I had to hear this from a colleague. Every month for the past 6 months I have disputing these debit orders. It feels like the security on these accounts is not to standard and no care is taken to protect the client. It is ridiculous that you must log on to your account almost ever day to see if there is no unauthorized activity on it. It is ironic that when I had the more expensive bundle account, I never got this. Never!