purchased item not delivered and custimer support has not contacted me after grievence registration

Location/place: thrissur

Name of company/service: ebay.in

purchased item not delivered and custimer support has not contacted me after grievence registration.
ebay.in item number : 290903583593 .
it was paid using internet banking . refernce number : MSBI2976408377IGH8841756 TRANSFER TO 31014960840 BILLDESK TRANSACTION A