Xpressbees Logistics — Service related

This is dr. Shubhi..
Pickups were scheduled on the same day for my orders from myntra and ajio.
The delivery person who also brought two orders from ajio, when asked for the pickup order(without mentioning myntra or ajio) was given ajio's order by me, in place of myntra's.
The guy also passed the quality check, and now the return has been shipped with the refund processed for the wrong product, before i could discover.
This would put me at loss for one order and the seller too..
I have tried contacting xpressbees because only they can resolve the issue, also tried mailing them but all went in vain.