I have tried to delete my account, but it says that I have pending or active proposals. The things is when I go to the Proposals page I have none.
Could you please delete my account?
You can click on the round icon in the upper right corner, go to Settings> My Info and click "Close this Account" link at the bottom of the page. You will see this link at the bottom on the next page:
You should be able to click on your name in the upper right corner, go to your Settings> Contact Info and use the link on that page to close your account.