Dubious FNB

I have been using FNB for a long time now, honestly I cannot remember when I started but it has been more than a decade. For more than five years have been struggling with these myriad of ******* deductions on my FNB account, and also have another account with another bank but I do not suffer similar headache of deductions as I do with FNB. In some cases I have even lost money because such deduction could not be reversed because I have discovered them after a month. As far as I remember every successful reversal of such deduction comes with penalty that is levied on holder’s account. We are bombarded by calls from unknown call-centres claiming to be from FNB or working with FNB even if you say NO to their offers your money get deducted. Ok, what is strange about this is that they will deduct your money, and the questions that arise are: 1. Where do they get one’s information (names, and Bank account)? 2. Why FNB do allows such deduction by companies that lacks integrity (usually they do not have physical location, contact number not reachable) to do deductions on people‘s accounts? 3. Why do such company say they work or they are from FNB? 4. Why is it FNB customers that suffer the most? My conclusion is that FNB is a dubious, and highly probable that this is a collusion between FNB and ********* or their staff is selling clients information to *********, OR FNB security is weak it has been compromised. If I did not have investments with them I would have long time cancelled my account I am just waiting for maturity of such investment, because I am tired and it is costly to do monthly visits just to reverse such deduction.