Bad bank wil be changing

I am so disappointed with this bank I I app**** for a loan with a company tey said I must frist accept the debicheck Before tey can send the money they didn't send the money so I asked the bank if they can cancel this debi check so they don't do a debit order on my account but the bank don't want to and this company don't want to as well this is unacceptable that the bank it self can't cancel it when even fnb gives that option now what if they debit money out my account then what this is beyond unacceptable