havent received delivery and no response from the manufacturer

Location/place: new delhi

Name of company/service: datawind innovation private ltd.

sir
i pre ordered ubislate 7+ for the same i made pre payment via cheque.
but i havent received my product and also the manufature ( datawind innovations pvt ltd) did not reply my emails. besides it their coustmer care no. is not working.
details of prepayment….

bank name – citi union bank
branch – rohini delhi
cheque no. – 93226034
date of sending cheque – 7 may
date of deduction of balance from
a/c : 4 june
request no. – PM379B80C9CF