ASKWB

4: A State Govt. Pensioner/ family pensioner seeking enrolment under the West Bengal Health Scheme, 2008 shall exercise option in Form No-I in duplicate along with an undertaking that upon enrolment under the Scheme such Pensioner/ Family pensioner shall forgo the regular medical relief drawn along with monthly pension.
The option shall be submitted to the Pension Sanctioning Authority. The Pension Sanctioning Authority after scrutinizing the option exercised by the pensioner shall issue a certificate of enrolment in Form-II in favour of the Pensioner/ Family pensioner to be effective from the first day of the month following the month in which the certificate is issued.
The Pension Sanctioning Authority shall send one copy of the certificate to the concerned Pay and Accounts Office/ Treasury with a direction to discontinue the drawal of regular medical relief with effect from the first day of the month following the month in which the certificate is issued.
For relevant orders and necessary Forms please follow the link to download.

As per Rule 14.1 of Agreement of West Bengal Health Scheme 2008, "All bills and papers related to the beneficiaries treatment shall be handed over in original along with the necessary counter signatures by the authorised persons."
As per Rule 15.1, "If any dispute or difference of any kind whatsoever (the decision whereof is not herein otherwise provided for) shall arise between the Authority of the WBHS 2008 and the Hospital/ Diagnostic Centre upon or in relation to or in connection with or arising out of the Agreement, shall be referred to for arbitration by the Director of Medical Education, West Bengal, who shall give written award of his decision to the Parties. The decision of the Director of Medical Education, West Bengal shall be final and binding. The provisions of the Arbitration and Conciliation Act, 1996 (26 of 1996) shall apply to the arbitration proceedings. The venue of the arbitration proceedings shall be at Kolkata."
So just start a discussion with the Hospital authority that you are going to act as per the said rule and going to take legal action. Always keep received copy of your application as a proof.
By the by, you may also contact Medical Cell at Writer’s Buildings for necessary guidance in this regard. Enter Writer’s Buildings through Gate No. 1, and then at the Ground Floor you can find ‘Medical Cell’.

1: This is also applicable for Teachers. But I think the (Basic Pay + Grade Pay + Dearness Allowance) exceeds Rs. 20,000/- p.m. in case of teachers. So they are not eligible to get the bonus.

This is applicable for all the state aided organizations. Likewise schools are also falling under the purview of this order.

This is very unfortunate. What is the objection regarding the 2nd arrear bill? What is the status of the bill at present? At first bring to the notice of your higher authority about the fact in written form. As such, do not forget to keep evidence (Received copy)of your communication. If no response within a fortnight then a give a reminder with a copy to the next higher authority. Mention the urgency of the money before Durga Puja very strongly and give a reason accordingly. Your move should be desperate and polite as well.