Hathway — Wifi work only 15 minutes after router switched on

Address:

C/211,shivaleen building, 60 foot road, BHAYANDAR West 401101

My previous ticket is closed by hathway without resolution. Again contacts hathway customer service they raise ticket. And now not connecting to technical department from last 4 days. Please help me as soon as possible.
My account number is [protected].
On date 14/07/2020 they send technician, but after 15 minutes he went again same problem im facing. Very bad service.
Today date 15/07/2020 its 5th day of my hathway internet is not working, but they are only raised tickets. And all complaints resolved automatically without any proper resolution. My work has spoiled. Please help me.