wrongly debited the amount we agreed on

my name is caroline contact number *** i had a sim card with telkom with another number *** .currently i have cancelled it. i need my money. this month was thier first debit and they deducted 700 instead of 60 rand. when i ask they said i had the subscriptions on my phone, to my knowledge i dont have those subscriptions and can they show me those subscriptions. i am not happy because that amount incovinance me my other debit did not go throgh because of that. please assist me. my email is ***.