Byjus — Refund not processed even mailed multiple times and called on mentors request raised

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I purchased the tablet with the course for 3 years from byjus with refund policy they said even tried multiple times calling and mailed they are not responding .
even they proceed the ecs from bank and i have charged 2600 as bouning charged and now i am facing financial issue and student not like the program at all .
they are cheaters after taking money they are not responding.