Immediate transfer still not showing after days

For a 2nd time in 3 months, my immediate payment was not showing in my account and Absa does not know why it happened. The first time this happened it was R7000 that just 'disappeared\. It took 7 days for my money to show in my account. This time an immediate transfer of R3000 was made on 23 Dec - still no money in my account. I have made a transfer of R4800 on 26 Dec. This morning on 27 Dec no money in my account. First time round Absa point blankly denied being responsible