Okay, so I paid the $25 i needed to get the $25 donor rewards. I then decided I wanted to be a $50 donor instead of $25. Being afraid nothing would happen if i just paid another $25, i paid a full $50. I got the $50 donor and everything, and all is well. So right now I have given Skyblock a total of $75. So, if I want the $100 donor, do I have to buy it all over again and pay a total of $175, or can i just pay another $25 somehow?
There is an option to upgrade from donor25 to donor50 and there is no need to worry about it not working because it will work. But now that you have already paid the full $50 on top of the $25 i would strongly advise you to contact and administrator.