IS kidnapped the believers on February 23rd whilst retreating from town's in Syria's north-eastern province of Al-Hasakah.
A small number have been released after a ransom was paid.
'Peter' asked for his real name to be kept secret when he spoke to media for the first time since being freed.
He said: "They entered our village at five in the morning, while everyone was sleeping. Some of them were Syrians, some were Chinese, some Russian - people who didn't speak Arabic.
"They took 17 men, three women and one young girl and put us on the back of pick-up trucks with our heads covered."
According to The Times he said: "We don't know why they took us - we didn't do anything".
Premier reported last month how thousands of Christians were having to flee their homes in Syria in the face of Islamic State attacks.
Believers had already been forced to abandon their lives in Iraq by the group.
Reports now suggest at least 12 mainly Christian Syrian villages have been captured by the Muslim jihadis.
Images show entire families taking what belongings they can in plastic bags and boarding trucks and buses to leave the region.