I wanted to know where are ecce courses are conducted in mumbai

From here it appears that ECCE classes are run out of Billabong High School, Mumbai. Try contacting them, or KareInternational, for more info.

You could also try the One year diploma in ECCE course at Sadhana Education Society, Relief Road, Santacruz (W) opposite SNDT Women's University. Eligibility : Class 12. Call 26600757. Or visit their site SMT. KAPILA KHANDVALA COLLEGE OF EDUCATION.

Alternatively you could try the course at SNDT University too... its a postgraduate diploma course.

Best of Luck