Mandate expired very quickly

I app**** for a loan from Capfin it show it was approved then amendate was send through to my I logged to approve it says it expired, but I just saw the pop up only. I then contacted capfin which the consultant told me to contact my bank I call Capitec and Capitec told me the is nothing they can do as the loan come from capifin, capifin needs to resend the mandate again I called capifin again they still tell me to call my bank. I don’t know why to do anymore coz this is second time Capifin does this when applying for a loan on they side.