can i do phd after pgdm i have done pgdm aict approved from mangalmay institute of management study greater noida

You must pursue MBA or Masters in particular subject to get into PH.D ,adding this i would suggest you Mahatma Gandhi University which is UGC & AICTE approved which provides PH.D & M.PHILresearch programmes , the fee structure is also nominal,online on demand examination,multi-entry &exit programmes

Masters degree is compulsary to join phd insteed of a diploma, so you must have to complete your mba to join phd marketing.