Carrier Airconditioning & Refrigeration / Carrierindia.com — Windows AC cooling problem

I bought a new window ac on 18 july 2021. On 9th august i lodged a complaint(No[protected] on customer care about my A.C ' s room sensor issue. It was not cooling properly.2nd day engineer came, checked and said that pcb board has an issue and new part will come. 2 days later he came with the PCB board and changed but the problem remined the same. He tried to contact with his carrier technical team but no body responded him. He said that they will contact technical team and resolve as soon as possible. Later i contacted many times to service centre and they alwaya said that they will come but nobody came. Called many times to customer care and they replied that they escalated my request and service centre will contact me. But still nobody contacted me after 22 days. My AC is working like cooler. Due to room sensor error my room tempreture doesnot match with my ac tempreture. Ac is infront of bed so that i have to switch off it after a hour but within few minutea feel vert hot as room tempreture still high. Please resolve mt problem .