I am aware that RSorder is a fantastic RS Gold Shop.
If my friends recommend RSorder to purchase Runescape gold on mobile I'm giving it a test. I then Buy RS3 Gold and firecape and it's smooth and safe. However, sometimes, delivery isn't quick, so you must contact them via live chat. Don't worry it's 100% legitimate and fantastic service.
A lot of the time the delivery of their products is rapid.
If you're interested you can also read their reviews, and it might they can help you.
Best of luck!