Duagther’s right on already sold property

Hi sir, My mother has filed a case on a land where his father has sold the land with out my mothers signature and the case has started in the year 2006,my father has passed away inthe year 2009 and in the year 2012 the case got dismissed but lawyer everytime he says that it is in process judges are not coming regularly.. In the 2019 when we became serious and had consulter him few other lawyer he said that due to our junior lawyer negligence the case got dismissed and will reopen it again.. the he reopened it again and now we came to know that we don’t have any original papers related to our case in the court which we came to know by one of the Known megistrate In the rangareddy court and he found one paper saying that we have lost the case , so am taking all my originals with my moms signature on it. But the thing is we never asked for any originals from these many years and we thought that case is still going on..So finally lawyer has cheated us. When i called him he is still saying that case is in process and due to corona court has been closed it will reopen after june 30th and it is in our favour only and it will be done in few months. Can someone please suggest what can be done in this as we don’t have any originals with us now. We have all xerox papers