Demand and penality shown on dvat portal where there is no mismatch.

Drear experts, there is demand and penality shown on DVAT portal for the year 2014-15 first quarter on the site whereas there is no mismatch in the concerned period.Assessment for 2014-15 for CST is done but I am not able to apply for the C forms due to the blockage of the facility due to above demand. If I go to file objection there is no assessment order for the above demand so I can not file objection or appeal. On contacting DVAT office they are adamant that I should pay the due amount which comes around 5 lac, for which I have no liability. They are saying it is system mistake and they can not remove it. I don't know what to do after making endless visits to the DVAT office. There is no mismatch on the portal. My suppliers are demanding C forms. Pls help.