Mi service center kadapa - Mi service center delay to provide service on time

My self siddiq basha from andha pradesh kadapa I have hand over the mobile in the MI service center,kadapa, Andhrapradesh on ** may **** for repair under warranty, I got my mobile back on ** May **** after the service my mobile totally got defected iam having so many complaints again like (speakar problem, head set jack problem, memory card not detecting, mobile over heat, I have discuss with the technician Mr. vinod he said still this mobile has motherboard problem , so it's not my problem after the service my mobile got like , he need couple of weeks to fix my problem again,I have to go again to the service center to fix my mobile, I I have not hand over the mobile again to him he already spoiled my mobile condition I don't understand how may days they required to solve my small issue iam really iam Disappointed what was happens to me by the service center?

and they are wasting the customer time and value need to take the action on this service center, it's a manufacturer defect so it's there responsibility to take care about the complaint, but they keep asking me to come service center again and again So I need proper solution for case, please advice and take a complaint against the company they should not do like this with the customers they should solve the problem with in one time of visit with the limited time, but in my case they already took ** working days to solve my case under the warranty again asking me to wait more couple of weeks to solve the problem. Please advice on this issue what we can take a action against on this company. I want to take a legal action on this company, they should not do like this with other customer's They are playing with the customer's and wasting valuable time.

If you required any thing else from my side please do let me know .

Regards,
Siddiq basha
+**-**********