You can ask NabzClan for a copy of what it holds about you, or ask for a correction. Per the Privacy Policy (https://nabzclan.vip/threads/44/):

1. Write to NabzClan with the Contact form (https://nabzclan.vip/misc/contact), entering the email address on your account. The published policy says to write from that address. You can also open a ticket in "Copyright & privacy requests".
2. Say what you want: a copy, a correction, or both.
3. We reply within 30 days.

You can already see and change most account details yourself in Account details and Privacy in the forum.

You can also object to how your data is used, withdraw consent where we rely on it, and, if you think your data was handled unlawfully, complain to your local data protection authority. NabzClan would like the chance to put it right first. Where you live may give you more rights, and the policy says they will be honoured.

For deletion, see "How do I delete my account or ask for my data to be deleted?". This is not legal advice.