Review of the builder.

Q: Hi myself ABC, from Bangalore.
I booked a flat in Bangalore, at Chandapura. The project name is Palm Groves by Aryan Hometec Pvt. Ltd and Karsten Homes Pvt. Ltd. They say they are joint ventures and they are building this project together.
Therefore I would like to know the details about this builder along with the background and how the quality of the work they deliver to there customer, when am checking online complaint forum I see almost 90% of negative reviews saying deliver of the project will be delay by 1 one year also the infrastructure is not up to the mark as they agreed on the sales agreement. When contacting this people they say, they are there competitors who provide baseless comment to make the customers go away.
So as far my concern and already made a payment of 1 lakh. After seeing the review of this builder and do I have to still go ahead and make the further payment. Please suggest me, for further course of action I should take.