I've talked with them about this.But they told me that they could not change the invoice header because it used in conjunction with multiple companies and their invoices, print through electronics.
I've talked about it with them, but they told me that they can not change the invoice is due to be combined with several companies and the head of their invoices through electronic and print.
I talk about it with them. But they informed me that they can't change the head invoices because with several companies and their invoices printed through อิเล็ก machine company.