First please check your iTunes account and make sure the purchase is not "Pending" in your purchase history. Details of how to find your purchase history can be found here: https://support.apple.com/en-gb/HT204088
If your payment is pending please supply the following when contacting us:
1. The email you use for your iCertifi account
2. *A screenshot of the receipt for your purchase (you can obscure any private details if you want to)
*If you have not got your receipt yet for the in-app purchase this can be found in the transaction history of your iTunes account.
More details of how to find your purchase history can be found here