Where to top up an Istanbulkart transit card near Sultanahmet, Istanbul?

One traveler checked three tram stops in the Sultanahmet area in the morning — none had a working top-up machine. Staff at the stop directed them to the nearest metro station instead, where top-up machines are reliably available.

Another user claims top-up machines are present at every central stop and suggests the machine may simply have been missed or overlooked.

The original traveler insisted they specifically checked several stops, already know exactly what the top-up kiosks look like, and confirmed the machines were absent at those particular stops.

A third commenter noted that as recently as a month ago, machines were present both at the Sultanahmet stop itself and at neighboring stops — suggesting the situation may have changed recently (machines removed or temporarily out of service).