Hello @Daniel Ramsay,
My name is Henry and I am happy to assist with your inquiry, and appreciate you contacting LastPass Support!
I am sorry about the issues you are having on this process. The account can be deleted or reset from this link. When it asks if you know the Master Password, click No and you should be able to proceed.
Please let me know if this worked or if further assistance is required.
Thank you,
Henry | Customer Care