Correct errors in the script

Good day, dear freelancers! There is a script of money cases, like opcash - you can enter in the search and understand what we are talking about. Some errors in the script need to be corrected.

1. There are three types of cases, these are actually money cases, they work as they should, things and digital things (after which the digital code comes to the user). So, when you add something (no matter whether it is digital or simple) and create a case based on it, nothing happens when you open it.
2. On the site, you need to write another currency instead of the word ruble, until I have figured out where it is prescribed, so I also make this task in the project.
3. The transaction point does not work, more precisely, it works but with the intercasual system, but instead I have already connected an intercasual, I need to make the transactions appear with it.