@Iranpruad did you try already and encountered difficulties? The system has been a hit and miss for a few months now.
If it's not working if you can, purchase a voucher from a gas station amd top up the account until it will allow you to update it.
When you try again, use a different browser and clear cache first. Also, if you haven't tried it already, try the app. Some people say they've had more success this way.
