the system works automatically.
If seller hasn't shipped with in 5 days after receiving the payment. The system automatically generates refund and waits for 5 more days, even in that if seller didn't ship the item, you will receive your refund to your bank directly. no need to worry, your money is safe, but some very few seller are lazy and have not enough stock which creates a problem on ebay. next time purchase from a reputed seller with more 98% feedback.
hope this helps.
