This is my response to you:
1. Yes you can approach the registration office;
2. According to section 17 of the Registration Act, registration is compulsory in respect of documents in certain transactions;
3. Similarly according to section 36 of the Registration Act, it is stated that if a person presenting the document desires the appearance of any person, then registering officer may in his discretion take steps;
4. Proviso 2 simply says that if the agreement is presented and other party is not present, then the registering officer can also issue notice;
5. Consult a local lawyer and take steps.