Hitachi Home & Life Solutions India [Hhli] — inverter ac 1.5 ton, pcb faulty

My hitachi inverter ac 1.5 ton suddenly stopped working. I have raised the complaint on 28 june 2020 and till now the issue has not been resolved. Firstly, i struggled with the technician to visit my premises to identify the problem. After 2 days of continuous calling, technician visited my premises and said pcb is faulty and he has order for new pcb as we have taken the extended warranty for pcb from hitachi. From 30 june till now, pcb has not replaced and no body is informing us about the progress on the pcb replacement. Please let me know with exact timelines when will this be replaced as m suffering a lot during this to and fro movement of my request.

Very pathetic service, please resolve this asap as nobody is responding even after escalating through emails and calls.