Error in Encumbrance Certificate

Sir, I purched a residential plot in Chennai in 2014 throgh bank loan. Now I am trying to avail loan from other bank for construting home. My applications rejected in the process because of an major error in EC. Following the registration of sale deed I performed registration of MOTD with Bank. Dring clerical process of the documentation in sub-registrar office in the nature of document in the EC they wrongly fed " Conveyance" instead of "Deposit of Title Deeds". I am trying to rectify this error for the last two months all my efforts goes in vain, no progress. They kept saying they are working on it. At last they sent me to AIG office Santhom to aproach TCS stating that they have already sent a mail to them, I also went and checked and they conformed there is no such mails received from SRO. IIn SR office they dont even aware of the process flow to rectify such errors. TCS employee advised me to again SRO and request them to send a mail to District Registrar office, and then DR has to approve for this corection, finally with the prmission of AIG, TCS employee will make the orrcetion. I am hearing that the documents goes to DRO will be put on hold for long periods of time, it may take many months for getting procesed. I am undergoing terrfic trouble now, with available money i initiated the construction and brought up to basement, becuase of this issue affecting laon availableity the work is stopped. Pls. guide me how I can come out of this trouble. Regards