Hey Fawad,
1.IGNOU:-
Indira Gandhi  National Open University(IGNOU)
is good distance learning. The basic objective of the Proggramme is to open a channel of admission for computing courses for students, who have done the 10+2 and are interested in taking computing/IT as a carrer. There is a good option to go for an  MCA at IGNOU and Also, after completing BCA programme , A student will  get entry in jobs in the fields of IT.
Eligiblity criteria:- 10+2 .You can apply the for the form.

2. Mumbai University:- Also mumbai university is a better option for open learning. Entrance exam is conducted some where in july for 2019. There are good packages and placements as well.

Some Top ten MCA Distance learning Universities are as follows:-
1. University of Madras
2. University of Banglore
3. Annalmalai University, DDE.

All the best!

Hello Fawad

There are many distance learning universities available for MCA course, You can look for below universities for your MCA program

Amity Distance Learning University

Suresh Gyan Vihar Distance University

JIMS

IGNOU

These all are UGC approved universities, if you have a diploma of 3 years and experience other than graduation degree or you have done BCA or BSc (I am not sure about BCA or BSc) then you may take admission in lateral entry and save your one years. This lateral entry option is only available in JIMS and Suresh Gyan Vihar University.