Guild Task bug - no reward in Mail

What you were expecting to happen, and what actually happened?
Recently I’ve made blue guild task for 20000 coins. When I opened mail it said, that I’ve already received it, and it didn’t give me the reward.

What are the steps to make it happen again?
I’ve tried to make it again, but this time it went without problems and I’ve received the reward.

Do you have any screenshots or video you want to share with us so we can see the problem? Attach them to your post!

Please contact our support team. They will be able to help you with this.

Thank you, for your reply. Could you tell me please how can I contact them?

I’ve found it already and submitted. Thanks again.