Debit order not reversed

An unauthorized debit went off my account on 15/06/2018 . I called to reverse this debit at roughly 11am on Saturday 16/06/2018 and they told me they have reversed it and i will have the money in my account within 24 hours . Sunday 12pm came and i still had no money so i called again and the lady promised me this time that it would be in within 24hours . It is now Monday 18/06/2018 2pm i went to the bank at 1pm and they said they will do the reverse so that it shows in my account immediately . It has been another hour and i still do not have my money in my account is has now been 72 hours and the amount of R2153.56 has just vanished out of my account ,and despite a 24 hour promise standard bank are yet to assist me as their client.