Upgrading NBN error

Level 2

How can I get my NBN upgraded?  Every time i try I get the error i get E:adsl_comm:thread_exists


I have rung numerous times and be cut off or kept on hold constantly.  When i did get through they assured me the problem would be fixed.  This was a week ago.   Now there is no option to ring up and the online services are not giving me any service and do not reply to queries.  


Can i get a person to look at this and give me a solution.