If you have a PaySpark Mastercard associated with your Webmoney account, you should be able to use it to pay for your services using the Credit Card payment method.
If you are unable to use your PaySpark Mastercard directly, you should be able to add it to your Paypal account. Once the PaySpark Mastercard is added to your Paypal account, you should be able to use Paypal to pay for your services.
In case the alternatives above don't interest you or don't work for you, we are unable to accept Webmoney transfers at this time. In case we start to accept Webmoney transfers in the future, the option will appear in the client area.