Instant EFT still not done 23 days later

On the 15th of December made an instant EFT payment to my husband's Nedbank account. It is now 21 days and the funds are still not available in his account. We have visited 3 different branches and every branch hs a different story. The last visit was to Durbanville branch were they told us the funds is at interbank, but interbank don't know where the funds are. They told us then that it will be sorted 5-7 working days. And still 14 days later still no feedback or funds. So how long should we be waiting for Capitec to sort this out? This is money that is needed and is a very big inconvenience. Clearly, Capitec has no worry about the inconvenience this has caused us over the holidays.