In the exciting events there is a current recharge event. It started on 7/19 and ends on 8/2. If I am reading it correctly it is a progressive rewards set. I recharge 10k daily. I received rewards only on the first day of the event. I have recharged 90k total as of today meaning tomorrow I should receive the final event rewards. I do have JPG converted screen shot of the issue if someone can tell me how to post it here.
The only event I can find that matches your description is S4 total recharge and its a all recharges count towards event total. Event has a 100k diamond total. The event rewards should unlock as you reach each total. Yes please to the screenshot