I ordered from Superufo, forgot to add shipping payment what to do?

So I bought a PS2 => 360 Converter, which was 5 USD, when I was at the payment it said, item price, I wrote the price… but on my order it said it’s 8 USD shipping, so should I of added 8 USD on top of that or what?

Umm…GTFO of here and contact customer service.
GD is not your Superfuckyu Customer Service.

Costumer service Europe to China? I thought people would of had experience with the webshop since they sell Electronics

So has anyone ordered from Superufo?