Ismail Alabdullah, who volunteers with the White Helmets rescue organisation, claimed “the situation has become worse than ever” as the battle to take control of the Syrian capital intensifies.
He told the programme people live in fear of president Bashar al-Assad’s brutal regime, with his forces taking control of different areas of the city and shooting civilians without a second thought.
He said: “That happened today in one of the neighbourhoods taken by Assad’s forces – they captured the civilians, they took the activists, they shot them immediately without any hesitation”.
Russia’s bombing campaign in Syria in support of Assad has been criticised by numerous governments but Mr Alabdullah claims they aren’t doing anything to provide support for the Syrian people.
He also condemned countries across the world for not doing more to help, and added: “The international community has let us down, let the people down”.
Efforts to get new doctors to the city reportedly received “no response”, adding that the international community “didn’t do anything” to help evacuate injured people.
He said: “All the world let us down”.
The city is facing “nonstop bombing” as Syrian rebel forces continue to be pushed back, with Assad’s forces taking more than a third of rebel-held territory in the east of the city in recent days.
Mr Alabdullah said: “We haven’t seen this before… the bombing has intensifies more and more.
“I was trapped by the bombing – when I tried to move, another mortar hit our place.
“I survived, I ran quickly to somewhere safe… at that time, another warplane dropped a rocket and there was a big explosion.
He questioned: “In this situation, how can anyone do their job, to save someone or rescue a kid?”