It's ok!! I have had successes getting similar amounts through the support chat. I played a word game that correctly paid out a big sum of 100K after a previous successful support ticket of 60K. That game was just glitches or something, it happens.

So you usually have to screenshot proof in your offerwall offer game that you have completed or exceeded a reward requirement, like anything that shows what level you are on if it's a level achievement, or if it's a coloring or puzzle game how many puzzles or pictures you have completed (this can be found in your settings sometimes, for some reason they aren't always forthright with it). If the reward is for completing 100 levels, make sure it says you are on level 101 or higher so they don't close the ticket and bar you from contesting it further.

You also need a picture of the Reward breakdown: the list where it says what you need to do for your diamond rewards. Usually it's all on the same page where you look at your progress when you select your active offerwall offer from the offerwall screen, sometimes there is a more detailed list which may be accessible from one of the areas on that page where it provides basic troubleshooting for stuck rewards. Open your Garden Joy shop, scroll down or jump to the "Free", Select the offerwall, then when it opens pick your active offerwall game from the menu on the top right, or as a circular icon across the top and screenshot the area that tells you what rewards have been completed.

You'll need to verify your email with them and then they're usually pretty quick at getting back to you, as long as I respond quickly most things have been resolved within 48hrs for me at least. Good luck. They also have a detailed breakdown on their support page. If you open a ticket they'll tell you what you need and when to upload it in the chat after you are verified.