Refusal to send me my invoices for my 3G account

I queried my invoices for the last tax year that have not been sent to me. Due to my contract coming to an end in October 2014 and the number becoming prepaid they had to find my accounts in the back office, according to consultant and it would take 5 days to send me my invoices. This was suppose to be sent to me 23 July.<br> Cell number ***<br> Reference number S3-ABJ2P-P6K48 for initial call logged on 17 July<br> I just called the call centre again and was advised they can not help me and have no queries on system. This is absolute pathetic service and I have no way of getting my invoices to finalise my tax returns