Byju's — tablet repair

The counselor (Raj sir) who sold us the product informed us that if we have any tech issue it would be resolved really quickly and for free of cost.
It has been 8 months now and nobody has given a proper response regarding the repair of the tech issue. The response goes like this:
1. You call them.
2. They call you back and you explain the problem.
3. They inform your mentor.
4. Mentor calls you back in 15 minutes or longer.
5. You explain the problem again.
6. They connect you to the technical team after 10 minutes or so.
7. The technical team calls you back.
8. You explain your problem again.
9. They tell you to send them pictures of your tablet because apparently explaining them over and over again wasn't tiring and ridiculous.
10. You send it to them.
11. No response whatsover.
12. You call back.
13. They call you back. You explain them that you have complained but there is no response, so they ask you what is the problem, they connect you to the mentor.
14. Mentor calls back and when you say you haven't received an response they reply saying that they haven't received the email which is absurd because i think i know how to send emails and it was properly sent.
And this went on until 8 months and still going on.
Problems that need solution:
1. Your network of mentors and tech teams and responders.
2. Time is precious, please respect our time and please help us.
3. That counselor who was really sweet to us until he received the money and isn't even picking our call right now.
4. Please, we belong to a middle class family who value their time and money and marks so kindly help us before we stop being humble towards you guys!
And do not send any automatic response on this and check it out personally.
I'm a student and it feels really bad. Please improve sir.