Zero Service from Standard Bank!

I have lodged a claim for Flood damage in April. The Contractors are currently on my premises and are not addressing what I have expected them to. But Standard Bank has not once reported back to me on the status of this claim. So I have no idea what repairs Standard Bank have approved. The app they advertise provides me with no update on my claim either, so I have tried phoning Standard Bank. But despite holding on for 90 minutes my call has still not been answered as yet. The Contractors are still on site, but how can I resolve this dispute. Standard Bank service is non-existent!