Tata Sky — dth installation issue

I booked a tata sky new connection in guwahati on 5th may, 2019 at around 10 am in the morning which was a sunday and the website said that they are going to install the new dth on the same day at the time period between 2 pm-5 pm. However the local technicians who were supposed to install the box said that they are not going to install the box since they don not operate on sundays and they said that i should order some company's product as they are not able to install my dth. I called their tollfree customer service to resolve my issue, but they said they are going to install my dth today and i should not worry because the technicians are going to contact me shortly. But, the technicians did not arrive and the toll free call centres kept on giving false hope of service. Its better that they say they do not provide service during weekends. Its a very shameful practice of a company who has such a high reputation of service delivery. Hope for better service in the near future and proper customer service. P. S. Do not write on your website and accept offers to show we provide 24*7 service when your salesmen don't work on sundays. Please immediately cancel my order and don't bother to call again.