Can i have my invoices

Can you tell me why someone cant send me my invoices. I have 3 contracts so the statement doesn't help me. I have asked numerous times now for assistance. The last reply i got said i cant have invoices because i don't have itemized billing activated yest if i go to the website it says "Kindly note that you would need to have itemised billing loaded on your line to be able to get your invoices." yet i cant get the invoices i require. Can someone there help me or not. I need the invoices to be able to claim for 2 of the 3 contracts. Will someone help?