I have not read the entire thread, and in fact I could not read the original question well enough to fully comprehend it, which leads me to a question of my own, which I hope you will take as a serious, non-snarky and dismissive question: Are you fluent in English?
That is, do you read and comprehend it sufficiently well to understand what the bank management people are telling you about what you did wrong and why they have terminated you? I’m asking because your writing about the question is, frankly, barely intelligible. Perhaps you’re typing the question on a defective keyboard in the dark while fighting off a bear attack at the same time, in which case I will apologize. (Damn bears!) Otherwise, I am going to suggest that you take an interpreter with you, someone with whom you can converse easily and fluently in your native language, and who also speaks, reads and writes English well enough to fully understand what your former managers have attempted to tell you.
“Forced balancing” is a serious issue for bank tellers, cashiers and anyone who works with a cash drawer. “Making mistakes” can happen and can be excused from time to time and for varying amounts; no one expects perfection. However, “forced balancing” is a type of criminal fraud. It’s an admission that “mistakes were made, but I’m not going to admit to them” or “I’ve committed a crime by taking (or giving away) money deliberately from the cash drawer, and I am now attempting to hide that fact.” It may be that the level of your malfeasance does not rise to a level that the former employer wishes to prosecute you criminally or civilly for recovery of damages, but they have apparently concluded that they no longer wish to have a liar in their employ.
On the other hand, it may be that you are simply an unwitting dupe of someone else who is taking advantage of your naivete to enrich themselves at your expense. Perhaps someone is setting you up to take this fall for their fraud. If that is so then I hope that you can clear your name. But you need to present clear, intelligible, comprehensive and accurate descriptions and accounts of what happened – and I see no evidence of that.