Onida / Mirc Electronics — air conditioner installation issue

Address:

12/14a, devarajulu naidu street, venkatapuram, ambattur, Chennai, Tamil Nadu, 600053

My onida air conditioner was installed by onida people two days back, from the day they installed I have been complaining that water is leaking from the indoor unit, for two days they said people are coming, today no one attending my phone and responding, is this the customer service given by onida to it's customers? Also the invoice given by him when installed seems to have contact details of my old order, when I asked them to change they are telling onida captures it's details from mobile number since ur mobile is registered to the address you first only that will come in invoice, also the copper pipe was missing in the package so I paid for that too, when I asked in tata cliq(where I ordered the AC) that the copper pipe was missing in package they asked for invoice, the invoice now is in my old order contact details, how come I raise the complaint.