Asus India — Replacement of zenfone max new handset not provided

Address: New Delhi, Delhi

My brother purchased asus zenfone max - 3gb ram on[protected] from jai mobile zone. However, following issues were faced within usage of few days :
1) phone was getting too heated while usage.
2) with battery of 5000mah, there was low battery back up
3) aux cable port was not working
4) while usage of inbuilt applications, phone hang
5) during a call or playing game, the upper part of phone gets overheated.
All these complaints where brought into notice of asus service centre in pune on[protected]. The phone was submitted for 3 days. However it was provided on[protected] with replacement of main board & sub board. (As mentioned on service centre bill)
As the phone was brought into use on[protected], we found the mic of the phone wasn't working. The person who called, couldn't hear what we are speaking; however, we were able to hear them.
My brother visited the service centre again on[protected], to resolve the issue; the issue was resolved saying that mic contained some particles which are cleared.
As he was using the phone today, i. E, on[protected], following were the issues:
1) file manager was not working.
2) if we use the camera, it shows us the warning to insert storage card & try again (Though the phone contained sd card)
3) neither he could access gallery nor sd card.
My brother visited service centre for the 4th time today, i. E,[protected], issues were resolved in service centre, but after 6 hrs, same issues are being faced again.

We have requested asus india with the replacement of handset, however, we did not received any positive revert from them over mail.
We got their revert over facebook, that they will get back to us soon, the post was made on[protected] & today is 2nd day, there is no reponse from asus india.

Mobile model no: as zc550kl 6a/8939/32g/3g
Serial no : g6axb733k0988tn
Warranty expiry :[protected]
Rma no. Inxk690321

I am attaching herewith,
1) purchase bill & service centre bill
2) email sent print screen

We would like to have a new replaced zenfone max 3gb/ 32 gb piece replaced in complete working condition or complete refund of the expenses incurred until now.