We have been a running a commercial establishment since 1977 in a commercial building owned by a Society registered under Tamilnadu Societies Act. Initially the rent was fixed for 3 years and after 1980 the rental agreements were for periods of 10 years with rentall increase of 20% once in 3 years. In 2001 the Society wanted an increase of 100% rental increase and due to dispute filed a case under Taminadu Rent Contol Act but, later withdrew tha case and entered into an agreement for 9 years with an increase of rent at 20% once in 3 years. The last agreement came to an end on 31.12.2016. Now, they are demanding an increase of rent at 60% once in 3 years for the next 10 years. Do we have any remeady and is there any limit to increase of rent as per law?