Account sharing is at the owner's risk, staff may not be able to refund the item(s) or recover the account if lost. The account owner, of a shared account, will also be held accountable for any rules broken under that account name regardless of who was on the account at the time. Hosting publicly advertised "services" (payment for signing on another player's account and completing milestones/achievements/etc.) is permitted to staff members only.
Found this deep in the Server Rules post made by Ryan. Although I see you have already asked some staff members to do such service for your account, it's kind of the only way around this problem without breaking any rules. So people like myself or around the community can't really help and you would actually need someone like a staff member to review this post and that's if they think it'll be worth their time doing.
I would think staff members are probably going to be busy doing their roles and doing their part for the already expanding community we take part of.