My Forged Signature Done On Sale Deed Withdrawal Letter In Sub Registr

The seller sold the same property to two different buyers, submitting two sale deeds to the Sub-Registrar delhi office at same day and same time. The Sub-Registrar registered the sale deed of Buyer 1, while the sale deed of Buyer 2 was withdrawn using a forged withdrawal letter with a fake signature of Buyer 2. Sub registrar told that buyer no 2 withdrawn the sale deed but it was not correct. Sr told that as per delhi govt norm she can't hold the pending sale deed so she registered the deed no 1 . But the fact is sub registrar with seller and subsequent buyers all of them involved in making forgery signature withdrawal letter showing withdrawal of sale deed no.2 so that their way of registration of sale deed no 1 is clear. Now what to do when police is not registered fir and which forgery section is valid in my case as second buyer no 2 who is facing forgery and cheating??