I wanted to use prepaid plan, so I chose $15 unlimited text message.
And I add 1GB data($30) and 500 minutes calling($25).
These are total $78.4($70 + tax 12%).
I paid it by visa debit card at Koodo mobile shop in a mall.
I put the usim into my phone and activated it.
I also chose automatic top-up and register my visa debit card.
I found that another $56 was charged in my chequing account.
I activated my phone only 2 days ago and I didn't use it that much.
I cannot understand why this happened.