If you are getting the error with a code and telling you to contact customer support, apparently it's normal.
Contact they with a Clover Configurator auto generated serial number, it will not appear in their system but they will give you a solution.
Perhaps there is another solution to this problem, which involve not to call Apple.
More info here: http://www.tonycrapx86.com/general-help/110471-how-fix-imessage.html#post795297