Xiaomi India — mobile hanging problem in every time use

Address:

Panchkula, Haryana, 134102

I purchased redmi note 5, mei7, black 4gb/64gb on invoice no 07/05/18. But i am completely not satisfied with performance of mobile. If in a day i am using my mobile 100 times ie. Switch oning then 95 times screen hanging problem facing then again switch off and start again then after that mobile starts. I am completely fed-up with quality stop your ad that no one mobile in india.
Voice of listening and media also very low.

Please suggest solution.