What should I do? I have done BCA and I am interested in CSE and technical (CS) field. But, my parents want me to go for MBA.

As you have already completed your graduation, there is no point of doing graduation again, go by your parents' choice and pursue MBA from a reputed B-school such as Quantum School of Business, Roorkee. It is a top ranking college and have a great placement record. Quantum has great infrastructure,

You can do MCA if you have done your BCA, it is equivalent to B.Tech in CSE.