Can’t use mints

Have to wait a month to be able to buy one kind of mint. Then if it is one that is not already a ten for me it does not show up. This month the enchantment actually showed up but I already had it at ten. Last one otherwise to show up in my store was the enlightenment. As a result I have over 6100 mints waiting to be used . It would be nice if they would cycle back to the electricity mint or cycle to the concealment. In two years have not seen that one. Then to actually have them in the store. The last time the spearmint came up I was not able to go from 8 to 10 because it did not show in the store though I had thousands of mints. It would be better if they would just allow us to purchase them via the mints we earn when we want to. I saved back some mints way back when I could have spent them if I knew it would be 6 months or more with no ability to use them.