FNB LIFE NIGHTMARE

FNB LIFE- I upgraded my plan and then changed the debit order date from the 5th to the 10th of each month. The debit order went off successfully on the 5th of May for the new premium of R385, then it debited again on the 10th of May. Since then I keep getting emails of the policy being in arrears and attempted double debit. I have tried communicating for this to be sorted as I should not have any arrears on the policy. First attempt, I was not assisted because I sent my query from a different email address, I then sent from the email address "recognized' by you, only to get a one line response to a query I have been going back and forth with. Your customer service is extremely poor and frustrating, If I send a query from a different email address, why don't you try authenticate/run security checks instead of dismissing my query. Bad service like a government department, truly disappointing and very backward of FNB, Can this be resolved, I should not have any arrears on the policy as the debit order went off in May on the 5th, you were not supposed to debit me on the 10th if the debit order was already raised for the 5th of that month (May) . I have had this policy for over 10 years and such bad service because of incompetence due to poor training or just disregard for your clients. Can this be fixed!