Voltas — Voltas split ac cooling problem

Dear sir, I have purchased a Voltas split ac on 2nd June 2022 but same was replaced on 24rth August 2022 due to insufficient cooling problem. The new machine is also giving same problem. I have contacted customer care but my problem was not resolved. Service centre officials are not picking up my phone calls. The customer care officials only giving false assurance to solve my problems earliest. Kindly solve the issue.
Harish Chand Yadav. Mobile number: [protected]