As a part of university course I had to deploy an application to IBM Kubernetes. I have pay-as-you-go type of account with my credit card attached to it.

I deployed the application to the cluster (the paid tier with public IP) and after few days and the demonstration the cluster was not needed anymore. The cluster was configured to use dynamic provisioning with persistent storage via ibmcloud-block-storage-plugin.

The problem is that the cluster provisioned tens of discs and then when I removed it using IBM Cloud UI (with option to remove all persistent volumes checked) the discs are still displayed as active.

Result of invoking ibmcloud sl block volume-list:

77394321   SL02SEL1854117-1    dal13        endurance_block_storage   20            -            161.26.114.100   0       1
78180815   SL02SEL1854117-2    dal10        endurance_block_storage   20            -            161.26.98.107    0       1
78180817   SL02SEL1854117-3    dal10        endurance_block_storage   20            -            161.26.98.107    1       1
78180827   SL02SEL1854117-4    dal10        endurance_block_storage   20            -            161.26.98.106    3       1
78180829   SL02SEL1854117-5    dal10        endurance_block_storage   20            -            161.26.98.108    2       1
78184235   SL02SEL1854117-6    dal10        endurance_block_storage   20            -            161.26.98.88     4       1
78184249   SL02SEL1854117-7    dal10        endurance_block_storage   20            -            161.26.98.86     5       1
78184285   SL02SEL1854117-8    dal10        endurance_block_storage   20            -            161.26.98.107    6       1
78184289   SL02SEL1854117-9    dal10        endurance_block_storage   20            -            161.26.98.105    7       1
78184457   SL02SEL1854117-10   dal10        endurance_block_storage   20            -            161.26.98.85     9       1
78184465   SL02SEL1854117-11   dal10        endurance_block_storage   20            -            161.26.98.88     8       1
78184485   SL02SEL1854117-12   dal10        endurance_block_storage   20            -            161.26.98.86     10      1
78184521   SL02SEL1854117-13   dal10        endurance_block_storage   20            -            161.26.98.106    0       1
78184605   SL02SEL1854117-14   dal10        endurance_block_storage   20            -            161.26.98.87     1       1
78184643   SL02SEL1854117-15   dal10        endurance_block_storage   20            -            161.26.98.85     2       1
78184689   SL02SEL1854117-16   dal10        endurance_block_storage   20            -            161.26.98.87     3       1
78184725   SL02SEL1854117-17   dal10        endurance_block_storage   20            -            161.26.98.108    11      1

[ ... more entries there ... ]

All of those discs was created using default ibm bronze block storage class for Kubernetes clusters and have standard Remove policy set (so should've been delted automatically).

When I'm trying to delete any of those with ibmcloud sl block volume-cancel --immediate --force 77394321 I got:

Failed to cancel block volume: 77394321.
No billing item is found to cancel.

What's more the IBM Cloud displays those discs as active and there's no option to delete them (the option in the menu is grayed):

I don't want to get billing for more than 40 x 20GB discs as the cluster don't even need that many resources (the fault was in badly defined Kubernetes configs).

What is correct way to remove the discs or is it only a delay on IBM Cloud and everything will be fine with my billings (my billings show only around $19 for public IP for cluster, nothing more)?

Edit It seems that after some time the problem was resolved (I created a ticket, but don't know if the sales team solved the problem. Probably it was just enough to wait as @Sandip Amin suggested in comments).