Try 

http://mathforum.org/calculus/

http://math.stackexchange.com/

http://www.les-mathematiques.net/

You'll have to give more information on your level in calculus and what areas. I did calculus a long time ago and I wouldn't be of any use to you.

I hope you do find someone. Try your colleagues, your teachers, books, Internet etc etc etc. However, for someone to do it for free is a big ask.  

Maybe you could try a language/maths exchange. You find somebody who has a good level in English who can teach you calculus in exchange for English.