So what is your question?

Have you been paying the amount enhanced and demanded periodically ?

You may either wait for a response from their side or you may personally visit the office of the department and clarify the details.

You can wrote to them for extension of lease period as term of lease was only for period of 5 years and it has expired 

You need to ask them the same in writing whether they are interested in extension of lease or not

1. Have you paid the enhanced lease amount sought by it? Has a legal notice been served by you on ECOSOC to controvert the enhanced amount?

2. The original lease deed has to be perused to formulate an opinion on the rights and remedies. If there is a right there has to be a remedy.

Hi,

In the present scenario, you are suggested to approach the concerned authorities and do the necessary formalities to extend the lease. 

Must have lease docuemtn executed with ECOSOC, provision of extension must be in lease deed. Check that or otherwise you send your intimation for further extension and lease amount for next 5 years.

Since it is forest land, and in absence of lease deed, lease terminable by giving 6 months notice period.

Dear Sir, 

Now You are in permissive and settled possession of lands as such you cannot be thrown out by anybody without recourse to law. you may approach civil Court and get an injunction against them stating that they should not evict you without filing a suit for possession. 

If you are  continues paying lease amount after  lease expired and the authority accepts, then lease is automatically renewed.

1. You should either wait for extension notice from ECOSOC or send them a notice regarding extension of licence of next five years.

2. Also ask them to take deposit of 4,25,000 lacs as per law.