Registration of property and transfer of title

I purchased a house in the year 1995 in which I was living as a tenant since 1980. The consideration amount was paid to the owner under various installments. Of each and every installment a receipt was given by the owner stating that “the consideration amount in the form of such and such installment has been received”. Similarly the last installment has also been paid to the owner and receipt has been received. Later before the registration of the property as well as before transfer of the title the said owner went abroad and never returned for many years. On several occasions the owner was asked to come to India to register the property but he always expressed his inability to come. In 2017 the owner came to India and he was asked to get the property registered to which out of malicious intension he totally refused and denied that he has ever sold the property. Now since I have been residing in the said property since 1980 along with my family, what remedy do I have to get the property registered? And can the Owner file a suit for my eviction and any other legal remedy which he can avail