英语翻译I don't know why you have refused to send us your invoic

英语翻译
I don't know why you have refused to send us your invoice,my colleague
sent
you the PO 2 times now and there is no response from you,attached
again is
the new PO For our first order,kindly get back to us with
your invoice
stamped with your company name,we need this orders before
the end of
November.