func amountDidChanged() {
        if isCardsAvailable {
            switch statusOfSubscription {
            case .disabledByUser:
                selectedState()
                break
            default:
                authorizeImageView.isHidden = true
                authorizeLabel.isHidden = true
                setEnabledState(value: true)
                break
            }
        }
        isPreconfigurationsChanged = true
    }