Convection is not solely vertical or upward movement, yeah it easily occurs in upward direction.
prove my hypotheses wrong, as radiation is through electromagnetic radiations, so why did heat stop transferring when air in opposite direction was blown because Electromagnetic radiation don't depend on movement of air. So it must be something else not radiation.
Okay brother, it seems I am not going to be convinced by you, and neither you are going to be convinced by me. contact some good physicist for right answer and also tell him about my argument and hypotheses.

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"The only necessary thing for the triumph of evil is for good men to do nothing."
--Edmund Burke (1729-1797)