You said that you are limited yourself since your friend tried to transfer you some money. So you first have to ensure that your account has no limit and THEN contact BS and ask them if they can transfer you the money again... It's not a BS problem, it's a problem with your webmoney account.
hugostrange, please give the link, where to find this page of limits.
https://my.wmtransfer.com/purse.aspx?type=z