Nokia India — service period and unacceptable behavior of service executives

Address:

Faridabad, Haryana, 121001

I own a nokia 7 plus device. Recently, i had been experiencing difficulties regarding the microphone of my device. So, i decided to visit the service center. On reaching the service center, i was told by one of the executives that it would take about one for the microphone to arrive the service center and it would be better if i come next week. Following the advice, i again visited the service center after a week and on reaching the service center, the same executive again told me that the microphone has not yet arrived and that it might take another week for the part to arrive. I again visited the service center and this time the service center executive told me that the microphone has arrived and they will be able to repair the phone in just a few hours. I returned after few hours, and the service center executive told me that there was further issue in my device and that some more parts might be required to cater this issue. After all this, they told me that it might take another next week for the same to be repaired. Finally, i thought of contacting the nokia service team and even after telling them my issue, there was no response from the nokia team as well. It's been more than 10 days and i haven't yet received my phone.
I can't understand what kind of service is this and such negligence of customer's request is highly disappointing. Further, neither the service center nor the nokia team is ready to answer me on this matter.
Details about the service center are below:
Service center name: janak communication, 125/5, nit 5, opp to bankey bihari mandir, faridabad, haryana 121001
Service center number: [protected]
Jobsheet number:[protected]/181222/001
Device: nokia 7 plus
Customer name: vikas kasana
Customer mobile: [protected]