Section 120

I have been getting debits on my accounts for month that are unauthorized especially the Mzansi debit order for R99 and others . I then decided to move all my debits and my salary to another bank . today all of a sudden i getting section 129 sms . and i only owe R500 which is just bank fees. this is really getting out of hand fnb used to be a good bank but not anymore they are just reaping people of . I think i am going to close my account .