TCL - TCL supplied faulty product and not responding

I find it very strange that there is no response to my complaints and my TV is still not working after buying at around ** K and spending Rs. ***** for mother board replacement by you.
This is what I have done so far:
Bought your TV model L**P*MUS on ** March ****
TV stopped working on ** Dec **** and you replaced the mother board by charging Rs. *****.
TV stopped working again on ** Feb ****.
I contacted the service centre and they sent their mechanic twice. The TV was not repaired and the service centre is not picking the phone.
Sent you email on ** Feb **** and then replied to your query on **th Feb ****.
Called your call centre on *st March **** and registered complaint no. IN************.
The problem arose in my TV on ** Dec ****. (Please see the trailing mails).
The current status is that the TV is still not working.
I contacted TCL ASM Mr. Mohit and was advised that since it is technical problem, I should contact TCL technical team through TCL call centre.
I did as advised (this was last week) and was allotted a fresh complaint no. IN*************.
On enquiring as to why a new complaint number is being given, I was informed that the old complaint has been closed with remarks that the customer is not willing to pay. This is ridiculously false.
however I was connected to TCL technical team and after taking all the details, I was told that an engineer from TCL (not service centre) will visit in **-** hours. I was told that I will have to pay service charges of Rs. *** which I confirmed as agreed.
No one contacted me for * days.
After the time lapse I contacted the call centre again, I was put on hold for * mins and the executive informed that he has consulted the ZSM and confirmed that the TCL engineer will visit tomorrow.
No one came today.
I followed up with the call centre at around **** hrs and executive put me on hold to check the status.
After getting no response for ** minutes, I disconnected.
This type of behaviour fro a supposedly professional organisation is not acceptable.
I had tried to contact TCL HQ and by mistake my message reached TCL Australia. They were kind enough to respond back and advised me to contact TCL India.
Look at the contrast, TCL India does not even have the courtesy to respond to a customer's emails, instead is avoiding the customer, making false promises and not adhering to these and doing its best to harass the customer.
This brings me to the following understanding.
TCL has supplied a faulty product.
TCL knows that the product is faulty by design or has manufacturing fault.
TCL even after knowing it, deliberately fleeces the customer by further supplying a faulty spare part.
TCL has no process to deal with products sold with design and manufacturing fault.
The only way TCL knows to deal with such problems is by avoiding and harassing customers.
If my understanding is incorrect, please respond and resolve the problem.
TCL website says it is a customer centric organisation. Hope, you mean it.
Sanjeev Kumar Dhawan