Ebay.in — Not cancel order after informing them about its cancellation and not refunding money

Address:

New Delhi, Delhi

i made an order of onida phone from ebay.in, after that I inform them about cancellation of order and refunding of money but ebay.in not taken any action and order got delivered on my address, after that i call them and inform them number of time but they are not listening me and not picking delivered packet and not refunding my money.when i contact them on customer help desk they are not responding properly and not transferring my call to their senior bodies. i have made number of calls and emails but they are not listening me and not refunding my money.please help me!!!