Change & charge are two words are are written almost the same, but they mean two totally diffident things. Do not get time confused.

Change – to switch; to make something different

    I am going to change the tires on the car.
    We are going to change the furniture in the living room.
    My sister changed her phone. She gave me her old phone.
    We are going to change the insurance company.
    My father wants to change the Internet service.

Charge – the price that someone takes for goods or services

    The mechanic did not charge me a lot of money to fix my car.
    The bank charges us high fees (a lot of money).
    How much do you think I should charge for babysitting?
    The cell phone companies charge a lot of money.
    The landlord charged us for damages we did to the flat.

- See more at: http://english-the-easy-way.com/Confusing_English/Change_Charge.html#sthash.ksF4XrGB.dpuf