Onida / Mirc Electronics — Onida service center

I have purchased Onida AC from Flipkart in March'21
From last one year my AC stopped working I complained at customer service center Onida but no one came to visit
After calling for so many times thechnician came in March'23 and said PCB in outdoor need to be replaced
And again after calling so many times they replaced it on 1st June and charged me 13500 Rs but now again AC stopped working and I am calling them from last 1 month. Now he is not answering my calls
What do I supposed to do now???
At time of replacement he said for 3 months warranty and he refused for warranty