Mba useful for me who didn't serve notice period in HDFC bank?

I joined HDFC bank on Jan 25 and worked for 6 months. Before getting confirmation I resigned and joined another company in July 25 and continuing working there. I did not served notice period in HDFC bank. Now I checked my PF account and there are overlapping of pf contributions from HDFC and current company. Maybe hdfc blacklisted me.

So will it be helpful if I do mba as I can get rejected by companies for not serving notice period? Should I do online mba or regular mba? Age 30years. Male Current company experience- 1year Hdfc- 6 months