What is the reason for the refund? Does the game crash? Doesn't the game have promised content? Does impossible to finish the game?
Nothing is relevant from described above.
If you do not like something in the game, started to not like something, or tired from the game then it is not a reason for an overreaction or refund.
The game has saves in the campaign but does not have saves in battle, as many others games. It is a design decision. Battles do not take longer than one hour, 80% of battles take less than 30 minutes. Hard to find a game where you have to spend less time.
PS! You played Naval Action, how did you live without saves in battles? I think that a save feature in NA Port Battle is a must-have feature for Naval Action.