assitance getting radio or television internship

im a persitant, talented young lady who is studing journlism 2nd year.i have a Boston Media diploma on Radio Broadcasting, and have experience on radio industry, as i had a show for a local in house radio station, but at the present moment i really need to know how im going to approach a company that im interesting on doing their internship programme, mainly focusing on radio and tv Production.

i would appreciate any one who would know how this is done.
thank you
your in radio&tv
phethile khuzwayo (pk)