Trouble levelling up

[borax2tetadfora]

So, I progressed reasonably quickly until level 11 and now I'm stuck, and have been for over 2 weeks. The task I have to complete to pass to level 12 is breaking 4 diamond ores and I've done it, a thousand times, and still when I do /level it says I haven't.
Also I've been upgrading my clan by paying and giving exp, and on level 5 the leader should get +5000 claim blocks, and I had it but for mere seconds bc just as I went back to spawn they were gone, and never returned. So I spent money and exp, but didn't get the reward.

 

[tozztozzo]

Hey,
The ores must not be deepslate ores. Also, Survival has a lot of data sync issues, so you can try /hub before switching worlds to save any progress.