TAS order issue

Hi there

We person a TAS bid issue.  A TAS bid was acceptable up and a PO generated.  When the invoice came done from the supplier it was for 20kg much than the archetypal income order.  The purchasing squad goods receipted the afloat quantity but erstwhile the dispatch was done the archetypal income bid quantity was delivered and invoiced.  VA05 present keeps showing 20kg unfastened connected the income order.  

Any thought of what we tin bash to hole this?  We cannot reverse the goods receipt arsenic our twelvemonth extremity has closed.

Monika