Chandrayaan 2 was a highly ambitious mission for ISRO, and while the orbiter is working the lander failed during the last few moments before touch down. Based on the handful of public statements, and images from mission control it looks like braking from orbital velocity worked correctly, but the transition to fine control for descent may have resulted in a tumbling spacecraft which impacted the surface at about 100m/sec. However I hope more information comes along soon. Cees Bassa's tweets with the radiotelescope trace can be found here: https://twitter.com/cgbassa/status/1170075259804012544?s=20