Converting word documents into latex is notoriously difficult. There might be some software I am unaware of, but I have given up on looking and resorted to simply reformatting by hand.
The easiest way to convert a word table to a latex table, according to me, is to copy the entire table and paste it into a text editor. In the text editor you can simply use "replace all" and replace all tab signs (\t) with " & " (space is not really necessary, but it makes it more readable)
The line breaks (\n) can be replaced with "\\". To make the formatting in latex a little nicer I recommend replacing "\n" with "\\\ \n" in the replace function. The first backslash is necessary since \ is a special character and the first one will not be printed and the \n will not be shown anyway, it simply breaks the line.
Then you just have to copy and paste your new table into your latex document and reformat whatever else is not in latex format.
I use gedit for this. Works well in linux. But any good text editor should do.
Thank you Niclas for your valuable advice. Will surely try this option, too.
I have tried alternate online option, wherein, you make the table by feeding all rows and columns details along with data. And then generate the table in latex form. Its working, but still lack many features.
I want to try this option (advised by you) and check if it is working.