Absa reverse a EFT PAYMENT

PLEASE HELP ME!!!

So I MAFE a huge mistake and now I might lose money I really can't afford to lose. I've made an EFT from my ABSA acount to a FNB account (not immediate) transfer. It was suppose to go to my Fiancé but the last digits was typed in correctly. I phoned the call centre a mere immediately to inform them that I've made a mistake and to please reverse it. And begged them for help. They said that I should write a report directed to a department that will deal with it and Email it.... but it can take up to 3 weeks. How can this be possible. Who would keep R1000. 00 that was mistakenly transfered to their account in it for 3 weeks?!I've been a client of ABSA for the past 25 years but find this service really dissapointing and poor the call centre even put the phone down in my ear 4 times and said sorry we can't help. I need my money to be reversed back to my account asap. It was a non immediate payment after all.

That all I have.... I even have an email as proof of payment... Please help!

Kind Regards Luné Holtzhauzen