Here are some useful information and phone numbers:

Faculty of Medicine in Niš
Address: Bulevar Dr Zorana Đinđića 81, 18000
Niš
Tel: +381 18 422 6644
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University of Niš
Address: Univerzitetski trg 2, 18104 Niš
Tel: +381 18 257 970

Embassy of India
Address: Đorđa Radojlovića 7a, 11040 Beograd
Tel: +381 11 2 666 520

Embassy of Germany
Address: Kneza Miloša 74, 11000 Beograd
Tel: +381 11 3 064 300

Embassy of Nigeria - The Embassy of the Federal Republic of Nigeria in Budapest covers the Republic of Serbia on a non-residential basis.
Address: Virányos Út 4/a
H-1125 Budapest, Hungary.
Tel: +361 212 2021, +361 212 2022, +363 059 50973.

Embassy of Tunisia
Address: Vase Pelagica 19, Beograd, 11000
Tel: +381 11 369 1961

British Embassy
Address: Resavska 46, 11000 Belgrade
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Tel: +381 11 3 060 900

Embassy of Ukraine
Address: Paje Adamova 4, 11040 Beograd
Tel: +381 11 3 672 411
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Emergencies:
Police 192
Fire Department 193
Ambulance 194

Eko Taxi: www.ekotaxi.rs
Bros Taxi: www.brostaxi.rs

Glovo delivery: www.glovoapp.com
Wolt delivery: www.wolt.com