total lack of assistance

i made an error on purchasing airtime on cellphone banking and immediatly realizied it i phoned the helpdesk and explainend to them the problem and was told immediatly that there is nothing they can do as i made the mistake and i should just accept it and forget about the money there is no interst in helping a client as long as they get their bank charges i am closing my bank account and will go to another bank poor poor service and total disintrest in helping clients