FNB Device Cannot Provide an Invoice

I have a work cellphone allowance but can only claim with a proper monthly invoice from the service provider. Whenever I request an invoice from FNB Device department I am told that this is impossible as they do not processes monthly invoices. I am now looking to get a newer device but because of this sinister policy at FNB device, I cannot get it with them unless I am willing to forfeit my benefit as I have for the current device I have with them :(<br> <br> Not so innovative on this part!!!<br> <br>