Absa fail to Communicate

My husband has Car finance with ABSA , he received a call this morning the debit order was unsuccessful , which i do not understand we have enough money in the bank for our installment , then the guy who spoke to us can't even tell us what is the problem and he can't even give my husband the exact amount that i must now pay into absa's account , when i told him that i do not understand why the debit order failed because the installment is (R3100) i just gave him a round figure because it is something in that line then he says to me yes sorry for not mentioning please pay R3100 but that's exactly what i told him so what if it less ? so i think ABSA is taking a chance he can't confirm anything to my husband so who knows if the bank details he gave us is correct.. but they are fast to put you on the bad list but actually the fault is with you guys .. so disappointing and we regret taking car finance with you guys