It's a long time since I did this, but if I recall correctly you get a little button asking "problems with paypal? ..." or similar. If you click on it there'd be alternative payment methods like shareIT.

Even though I don't quite understand why you don't want to pass Paypal. It's not like you'd need an account or something.
You simply enter the payment and registration information for invelos and your credit card number. That would be it.