Sorry to see you go!
Before deleting your account permanently, if you are encountering any issue with Manga Rock, don't hesitate to let us know via our in-app support center or email firstname.lastname@example.org. We will address the issues ASAP.
To delete your account, please contact us via the above-mentioned channels, our agents will proceed your request at once.
Please note that there is no way to un-delete your account. It means that the account's reading history, favorite and downloaded manga will also be deleted.