Here is the best grocery hypermarket - from what I have seen in Belgrade. Of course, it is better to buy fruit-ovos on the market. But from the point of view of the choice of meat, meat products, dairy products, coffee (there is Lavazza d'Oro, for example), etc. - very worthy.
In the shopping center itself, on the same floor as the hypermarket, there is a good currency exchange point.
Also, literally opposite the shopping center is the Alta Banka office with Russian-speaking (on weekdays) staff.