Awful Service

On the 19 may 2020 there was an amount of R534.22 that went off as an online purchase of which i did not authorize, i contacted Fnb and i was told i have to dill up a form and email it. i did exactly what i was told to and i was told it will be resolved in the next 5 working day. so i called today bur they are just sending me from post to Pillar.