Am I eligible for MCA after completion of BCA course and 12th without Maths???

Sorry to inform you that you are not eligible for MCA as per the rules it is a must for the candidates to have pursued Maths in 12th standard. Since you have not pursued in 12th you are not eligible for MCA.

MCA Eligibility:
-Those who have cleared their Bachelor's degree in any discipline or are in the final year degree examination and have taken Mathematics as a subject in their High School Examination or graduate level are eligible
-Should have achieved their bachelor's degree from a certified university.
-Some reputed colleges require students to clear their graduation with a minimum of 60% marks.

Top MCA Colleges of India:
University of Pune Pune
Jawaharlal Nehru University New Delhi
University of Hyderabad Hyderabad
NIT Trichy
Birla Institute of Technology Jaipur
NIT Surathkal
Motilal Nehru National institute of Technology Allahabad
PSG College of Technology Coimbatore
NIT Rourkela
ITM University Gwalior
VIT University Vellore
BIT Mesra
NIT Calicut
Jamia Millia Islamia New Delhi
Lovely Professional University Phagwara
NMIMS University Mumbai
Nirma University Ahmedabad
University of Calcutta Kolkata
Anna University of Technology Coimbatore
NIET School of Computer Science Applications Greater Noida