Byju's — Byjus tablet not working , I paid 50,000 till now and no support from byjus

I purchased a tablet for IAS course, REG MOBILE [protected] . My tablet is not working since 10 days. I called them and raised a complaint 3 times . I asked them to call me back on [protected]. Everytime they say tech team will call you in 24 hours but it is still not resolved . I dont understand why this company is so famous and such poor services they give. I will file a court case if needed but I wont let my money go waste.