Tweakers, Crane Girl and the Semi-pocalypse

If a global crisis started and you were self-isolating and all stocked up on Funyuns, craft beer, and toilet paper, your next concern would be communication. Even if your smartphone worked, you'd still risk your life driving to the store for the newest model. But as bad as the flesh-eating monsters roaming the deserted streets might be during the gradual End of Days, the customer service at your government-funded, local wireless carrier is worse.
A sales associate for Ampersand Wireless, working through a crisis of his own, continues to come to work during an apocalyptic event. Flesh-eating monsters attack the survivors in waves, over a period of twenty-one months-yet customers keep coming to the store like nothing has changed.