Poor service

I joined fnb because i liked they way the handle their customers. But latly i would like to say its becoming poor. I called them and advise abou a possible debut order that might happen and told them that the company cancelled their services aftre i approved their debit and now they saying it will take a week for their finance department to cancel but fnb is refusing to cancel the debit on theur side. Fnb would rather have me loose money than assist me.