Luke 4:13 And when the devil had ended all the temptation, he departed from him for a season.
When Satan finished tempting Jesus he left Him but only for a season. Even Jesus wasn’t just tempted once. Instead He was tempted in all points like us. That means that the war with Satan isn’t one and done. It means that you will deal with sin and temptation. You will get victory. Then you need to prepare for another round that will soon come on you again.
You make a big mistake when you think you are past that. Oh that will not happen to me again. I had that problem but I will not have to deal with it again is a lie of the devil. Stand and fight but keep watching. Even in victory Satan is only giving you a brief break!