Proper allotment for space to add accounts and domains

[bill]

Didn't really know which Forum board to place this question in. If this is the wrong one please move to correct board. 

For money reasons I need to cut back on expenses of what I am spending for my VPS. I need to move to something that will not cost me so much.
I have had a VPS that I have been paying for. A few years back I got away form the expensive panel and installed WebPanel. I paying for 100GiB and seemingly WebPanel is reporting that in space I need for websites. Under accounts I show 44% used and Partition information shows...

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Filesystem      Size  Used Avail Use% Mounted on
/dev/xvda2       96G   40G   52G  44% /
devtmpfs        1.9G     0  1.9G   0% /dev
tmpfs           1.9G     0  1.9G   0% /dev/shm
tmpfs           1.9G  191M  1.7G  11% /run
tmpfs           1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/xvda1      488M  217M  236M  48% /boot


My problem is that I really need to move to a much less expensive way of serving websites.  I have WebPanel installed in my new system, but after CentOS7 and the WebPanel install I am not getting the space in the directory for websites. I have 150GiB on my new system, but it is only reporting 50GiB available for websites.

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Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   50G  6.1G   44G  13% /
devtmpfs                 1.9G     0  1.9G   0% /dev
tmpfs                    1.9G     0  1.9G   0% /dev/shm
tmpfs                    1.9G   18M  1.9G   1% /run
tmpfs                    1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/vda1               1014M  222M  793M  22% /boot
/dev/mapper/centos-home   96G   36M   96G   1% /home
tmpfs                    379M   12K  379M   1% /run/user/42
tmpfs                    379M     0  379M   0% /run/user/0


In the end I need to move all the accounts from old VPS to new system. As you might see I need more that 50GiB.
How can I redo the WebPanel install to get the space where it needs to be for accounts/websites? Is there some switches to use during install to ensure bulk of space is allocated to accounts? Is there a re-partition program that will do this through SSH?