It appears that you people are in possession and enjoyment of the said proeprty for more than 12 years which is averse to the so called owners of the property.
In fact they have not taken any steps to oust or vacate you from the property within twelve years of your squatting in the property.
The law on adverse possession is contained in the Indian Limitation Act. Article 65, Schedule I of The Limitation Act prescribes a limitation of 12 years for a suit for possession of immovable property or any interest therein based on title. .
Article 64 governs suits for possession based on possessory right.
Limitation Act is one of the important laws which prescribes the limitation period in which the things should have been done
The maxim that law and equality does not help those who sleep over their rights is invoked in support of prescripttion of title by adverse possession. In other words, the original title holder who neglected to enforce his right over the land cannot be permitted to re-enter the land after a long passage of time.
Section 3 of the Limitation Act says that Court will not take cognizance of any suit, which is barred by limitation even if issue of limitation is not taken as a defence. Thus, the law of limitation bars remedy but not the right. But section 27 of Limitation Act is an exception to the general principle of law of limitation and origin of concept of Adverse possession. It reads as, if a person fails to file suit for recovery of possession, within a period of limitation, his right to recover the possession of that property also extinguishes. If such situation occurs, a true owner extinguishes his ownership over the property.
Hence you my refuse to vacate the property and file a suit for declaration of title perfecting the las of adverse possession and also for permanent injunction restraining them from interfering in yor possession and enjoyment of the property.