Every contribution is processed individually. If you have already made your contribution and would like to adjust your perk, please contact the campaign owner. If your preferred perk requires a higher contribution, the campaign owner may allow you to contribute the difference in perk amounts and simply keep track of your preferred perk. In order to ensure you receive the correct perk, please contact the campaign owner before trying to contribute the difference. [Related Forum Article: Contact the Campaign Owner]
If you have already made your contribution and simply wish to increase your contribution or select an additional perk, you can do this in a separate contribution.
If you would like a refund for your contribution, please see: Refunds
If you would like to check on the status of your existing perk, please see: How to Check on Your Perks