Vijaya Diagnostic Centre — Home collection for covid and other tests

I booked a home collection for me before 4 days and added my wife's name also a day earlier. They confirmed the samples will be collected on 4th Sep, 2020 between 9am to 6pm. I waited till 3pm and called up call centre, they confirmed technician will reach before 6pm. Called again at around 5pm. The person told he has spoken to the manager and the technician and instructed him to visit my place first thing in the area. No one called till 6pm. I called again at 6:15pm, this time call got transferred to another person and he tells technician has not been assigned since I called only on 4th morning. I told him he was wrong and updated my whole conversation. He kept on saying no the system shows like this. I realized these guys messed it up. I called up again and this time a female Bhargavi picked up and she turned the story completely in a different direction saying 4th Sep date is to call up the patient and give a slot for testing. I asked if that was the case why someone confirmed multiple times that technician is coming. She says its due to overload and someone will call me to fix up timing. Day passed and nothing. Isn't it their responsibility to inform patients that they messed it up and no one is coming? In Covid situation every hour matters and these guys are cheating people in need.
Another one, while the govt is promoting contactless payments especially during covid, these guys are collecting only cash and everyone knows what is the reason.
Pl correct them so that more people don't get cheated by them. Absolutely irresponsible people.