Lenovo — Ticket no [protected]

I brought a new lenovo laptop which suddenly stopped working raised the ticket number mentioned above. It took lenovo 28 days to replace the malfunctioning parts, which included mother board. After changing the mother board it is asking for Bit lock password which i never had it is a personal laptop for my wife for his official work, neither the service engineer had it he was asking me for the same. His team lead said that same and said that it is lenovo who will give the password, and it is not his or his team responsibility. Password is pending.
My wife work is hampered from last 28 days as laptop still not working.
This is the way lenovo work then i make sure i will ask all companies known to me stop purchase of lenovo products.