Myntra.com — wrong product delivered and no pickup since a month

Ordered nike flip flops on 24th september. Received women tshirt on 9th oct when the promised delivery date for flip flops was 28th sep. Worn out packagin. No bar codes nothing. 7 days after numerous calls and complaints they approved return and now since last 7 days no pick up. No option of contacting call center on the app as the same has been disabled by myntra. I have mailed them repeatedly but there is no response from the company.