Dell SCV3020 Assigned New Disk But Not Allocated

As the title mentioned, I've assigned a single new disk to my array in to try adding capacity to my already full storage types. However, it doesn't shows any progress even after 10+ hours of assigning the disk. I did choose the rebalance RAID immediately option when I assigned the disk.

I can't even access the VMFS datastore on the array anymore to delete any unused data because it's full (I encountered connection time out when rm -rf an unused VM folder).

Any assistance is much appreciated.