Ikall N9 Tab — Not connecting to data connections and abruptly shutting down.

I had bought an ikalk n9 tab through flipcart on may 29 2021.it is a bad product. It is not connecting to mobile data inspite of changing vodafone and bsnl simcards. I had tried everything. No use. They had rejected my return request. The tab will shut down abruptly even if the battery shows charge. Do not buy ikall products. They are frauds and thieves.