Carrier Airconditioning & Refrigeration / Carrierindia.com — Carrier 1.5 ton ac- bought on 19.04.2021-continuous sound problem

This is S Annal from Pondicherry. Me and my sister went to Pondicherry mall Reliance Digital to purchase Ac, there they said about carrier Ac. We bought carrier 1.5 ton ac on 19.04.2021, and they delivered product on 20.04.2021 afternoon. For installation they came after 2 days of delivery only after we called them many times... installation persons came on 22.04.2021 they are not responded well to us.. one of the person said that he doesn’t know where to connect the wires in indoor unit of Ac.
Installation was not professionally done... Before we Heared alarm sound but was not continuous.. We are hearing continuous high pitched alarm sound from today morning 7am even after we switched off the main power supply. We have 8 months kid at home.. Pls consider this, no human can tolerate this.. This sound irritates us a lot... Morning we have filed request, till now no-one came... Kindly consider us and do the needful. And we need replacement too.. thank you