Whirlpool India — Required invoice copy or bill.

I ordered double door refrigerator from your official site last month on 25th april which gets delivered on time but still no invoice copy or bill is shared with me. Every time i called ur toll free number they told me to send mail to ur mail id [protected]@whirlpool.com but i haven’t received any reply even after 10 days of mailing. I am fed up after following up for my invoice copy from your site via mail and over phone. I am attaching my delivery slip and expecting to get a proper channel to receive my invoice copy on my registered mail id : sunny [protected]@gmail.com. Contact number [protected]