I delete all my listing

I am new seller on Amazon and Continuously 5 orders got cancelled in easeasy ship Because the delivery boy did not come to pick up the order. I talked to Amazon seller support but all they could tell me was to fill up a missed pickup form. I'm tiered od all this things. There is no other way to do this.And I filled the missed pickup form but I haven't received any solution yet. My orders are still getting cancelled. What can I do now . so I delete all my listing and deleting my account.