You have put in 24 years of valuable service, and ultimately, you are entitled to all benefits admissible and a good service relief from the parent organization. My sincere and best wishes for your valuable service to the organization, whoever it is.
Regarding procedures
You have not violated any organizational procedures as they have requested you to collect dues from the customers (outstanding dues). In fact, your parent organization knows about these outstanding dues. Every organization has its own method of collecting from customers, and the dues may be outstanding for various reasons. Therefore, you are not the sole employee responsible.
1) Get yourself relieved from services on the specified date, 31st of October, as the employer seems to have accepted your resignation/voluntary relief from service.
2) Some employers may not provide relief to well-deserving employees from their organization; they may exert pressure to retain them. You could consider talking to your owner/HR to secure your relief.
3) If you are eligible for EPF final payment and due for pension upon completing 58 years, an amiable relief will benefit you. Have a personal conversation with your employer regarding this.
4) Assure them that whenever your services are required, you will tender the same with generosity.
5) The other way around will delay all payments due to you and hinder your progress in the future. Getting your work done is important; nothing else in life. (This is not advice; this is the practical truth of life).
6) You are well aware of your organization; now, utilize this knowledge for your benefit.
Everything in life goes well...