Flipkart — Wrong invoice received. On repeated calls to customer service no response

1)I had ordered samsung refrigerator in exchange of old refrigerator. But at time of delivery, the old refrigerator was rejected by FLIPKART. I HAVE PAID TOTAL AMOUNT OF THE FRIDGE. but the invoice provided to me says old fridge exchanged and invoice amount paid displayed in less than the actual amount I have paid. On repeated complaints to flipkart, they are not resolving my problem.
2) Apart from that they didn't provide me bill at the time of delivery
3) the fridge is damaged piece. Now I am contacting samsung regarding the issue. But the same ..my issue is not getting resolved. I NEED FULL INVOICE FOR MY PURCHASE. ITS BEEN A HIGH TIME I AM COMPLAINING BUT A COMPANY LIKE YOU ISNT RESPONDING.