FNB says " HOW CAN WE HELP YOU" well you dont live up to your standards. Practice what you Preach

i recently sold my property which was bonded with FNB.There was a shortfall amount & both parties needed to sign an Acknowlegdement of Debt. All the necessary documents was forwarded to FNB via conveyance attorneys. FNB were supposed to debit both parties account but only debiting from my account. When I queried this , FNB says that they didnt received the 2nd party's debit instructions. Therefor they cant debit his account. Im the only 1 paying at the moment & I feel its unfair. It was also said that if I stop paying then we both will be handed over to lawyers. Worst service I ever received from any back. I need to log an complaint with the Ombudsman too.