Disappearing Sim Cash

I had the same problem over a year ago. I contacted support, because I did not know where my sim-cache had gone. It turned out I accidentally clicked on the exchange.
I asked to convey to the developers a request to enter a confirmation of the exchange of large amounts of sim-cash. Or make a reverse exchange of simoleons for a sim-cache.
It's sad that during all this time, no update has provided such an opportunity.
Many players have this problem. Is it really that difficult to solve?