We cannot officially endorse any brand here at the moment. Also, all India level coaching institutes (such as Paramount, or Brilliant) that teach for higher level / competitive exams, generally do not impart coaching for UGC NET. I did some research online, and came across a coaching institute named careerendeavour. You can have a look at their website careerendeavour.com. They claim to have taught AIR 4 and 7 of NET / CSIR.
I would suggest you to go to your nearest coaching hubs on any weekend or when you are free, and check out the coaching classes nearby you. Correspondence courses are hardly effective, it is better to join live classes for more effective coaching.
Or you can buy some good books and start preparing yourself.