Not all store ID is actually the same ID that was tracked in your ShopBack account. If you are unable to search for your CashBack based on your store ID (order ID from the Merchant's), you may refer to the purchase date and time and tally it with your click-through time as an alternative!
If you have difficulties to search for it still, fret not! Do reach out to our friendly customer service agents here! We would be glad to assist you!