Controversial issues and their resolutions.

Hello, I have a question. I was playing against someone, and there was a battle between two main heroes. Towards the end of the battle, it seemed like the advantage was starting to shift in his favor, but then the connection was interrupted. He immediately thought I had done it on purpose and suggested that I admit defeat... It was impossible to remember all the moves, as nine rounds had already passed. In short, I was forced to finish the game, and even then, only that one battle unofficially. In this regard, I have a question for the future: if the connection is interrupted during a battle and it is impossible to remember all the moves, do I have the right to ask my opponent to replay the battle, and if he refuses, should I write a report about his victory? Or should I do something else? (In general, during long battles, players may have different perceptions of how to make the most optimal moves.)