OnePlus India — Oneplus bullets wireless Z bass edition repair delayed

I am having a worst experience while claiming warranty of my device(REF ID: OF6DDCNDBW2U). It was picked up on 13 oct 2021 for repair, after pursuing for more than two months, I have still not received it.Customer care people keep on saying that my case is escalated for about 1 and half month. They just keep on asking for more time from me. Their application shows that device shipped until now(18 December 2021), but how come it is taking more than two month to get repaired. I had to buy new handsfree because of this. I do not know whether I will get my device back or not .I am feeling cheated.