Idea Cellular Ltd. — Idea deducted money wrongly but not refunding

I got following message from Idea "Dear Customer, thank you for downloading Fun_Zone from SYMBIOTIC. You have charged Rs 30." When I called to their customer care they agreed that this is not a Idea service and SYMBIOTIC is some third party website. but they are not refunding my balance. Over this customer care executive said that I have downloaded fun_zone from paid website. I dont understand what is this paid website means? and how can Idea pay on my behalf to anyone. It seems like they are trying to make me fool by saying all this crape.