FNB WHO CANNOT HELP YOU AS A CLIENT

there is a service provider who is deducting R500X4 ON MY PREMIER ACCOUNT EVERY MONTH AND I ALWAYS REVERSE THOSE AMOUNTS AT FNB BRANCH WITHOUT ANY PROBLEM.OF WHEN I WENT TO FNB TO REVERSE THOSE AS USUALLY NOW I AM TOLD THAT FNB IS NO LONGER DOING REVERSAL I TOLD THEM TO SHOW ME A PROVE OR A LETTER THAT SHOWS THAT I AUTHORIZE THAT SERVICE PROVIDER TO DEDUCT THOSE AMOUNTS THEY DONT HAVE BUT THEY ARE NOW REFUSING STOP THAT DEBIT ORDER IF YOUR BANK CANNOT PROTECT US AS CLIENTS WITH OUR MONEY IT MEANS OUR MONEY IS NOT SAVE AT FNB