Consumer Redressal

Dear Sir/Madam, I purchased a mobile from Univercell, MG Road, Vijayawada. Model is HTC Desire 820. Later, I discovered that its a defective handset. It is freezing and auto-resarting. It caused me a big trouble. I had to miss a communication from my boss. Presently, the mobile is with service centre people. Its been 12 days since they took my mobile. I lost reliance on HTC company. I request you to see that they return my money, so that I will purchase a handset of another better make. Thank you.