Acer India — acer tablet not working

I bought acer one 10 tablet from dehradun in 2015 and little did i know that i'd made a real bad deal, the reasons are stated below:
Since day one, the tablet never worked properly and had to give time and again to the dealer for sorting the problem, who in turn never rendered satisfactory after sales service, as he knew we had to leave india after a month, he did only temporary repairs.
Then we relocated to kenya for 2 years, since there are no authorized service centres in kenya, in the span of 2 years, 4 times we had to send the tablet to india for proper fixing of the consistent problem, unfortunately it was in vain as they failed to find the permanent solution.
The recurring problem is that there is no external indication, as to charging of the tablet. No matter how much you charge, the battery always is low and it could not start. There is no problem with the battery, as told by the various specialists who checked the tablet.
Apparently, after reading the web feedback of the same model on various consumer forums, i found that this is inherent defect and lots of customers are facing the same problem worldwide, but their grievances, so far had never been addressed properly by the company.
As the product was not cheap, which can be used once (In my case i've not even used properly more than a week) and thrown thereafter. It costed me inr 22000/-, which is quite a money.
Hence i am looking forward for some solution, as to how to claim back my money from company as they did not agree to replace the defective piece given to me. Though i've emailed them my grievances, they are suggesting me to visit dealers referred by them, but i've done enough of my bit in running around, since the time i bought the tablet.
I'll really appreciate if i get refund or proper replacement of the same in good working condition.
P. S. Refer the attachments for details on model purchased and bill.