Meesho - return not done

I ordered a product for a XL size and received S size, then i requested for return on ** may and the product was to be picked up by the shadowfax courier service on ** may but they didn't. I received a call from Meesho asking me if I wanted to reschedule the pick up, since it was automated, i pressed * for yes, but I saw that the return had been cancelled on my Meesho app. I reinitiated the return on ** may and it was scheduled to be picked up by ** may yet again no one came for the pickup or contacted me in any way. I contacted customer service and they told me to wait for another *-* working days. how long should I wait
the customer care wasn't ready to take my complaint seriously