If your account was independent before the attachment, please contact support to get detached.
In case, your account was created by the studio, support can't detach it as the account belongs to the studio. You need to ask your Studio to detach the account (instructions for studios). If a Studio does not agree to remove your account, you can create a new independent one using a new email address. Once you approve a new account, your documents will be rejected on the studio account.
Please note, that some studios may have a specific protection period. The studio should let you know about it and provide the details of this special agreement. During this period, detachment is possible only from the Studio side, even if your account was registered from your side and was independent previously. Also, it will not be possible to create a new account.
Note: models can leave studios that are blocked forever. Please see here how to detach your account from a blocked studio.