Reliance Jio Infocomm — jio phone malfunctioning

Address:	Lucknow, Uttar Pradesh, 226002
Website:	www.jio.com

I purchased a jio phone from hazratganj jio center. I a month it has malfunctioned 4 times. I am losing all my contact number all the times. When i asked them for a solution they said write down the numbers in a diary. There were aproxx 600 phone numbers which is not possible to write it somewhere. I wish to get the phone replaced, exchanged or returned which they are not doing.