Deplorable service from online iStore pre-owned department

My complaint is specifically about the online pre-owned section of iStore. I ordered an iPad, and was completely unable to track the shipment - the online iStore totally ignored ALL my emails concerning dates that I would not be at home!!!! I received multiple SMSs from DHL courier, but had no tracking number!! The iPad was delivered by SKYNET while I was out, and it was handed to the gardener! iStore pre-owned kept sending the same email, which basically said “we have not heard from you; should there be no reply, this ticket will be closed within 24 hours”. I rep**** to several of these emails within hours of receiving them, and yet the emails kept being sent!!!! The service is, in my opinion, appalling!!!!