If it's been 7 months, that should be plenty of time to replace the money. If the money was too much to replace in that period of time, I'm not sure how I can believe it was of an amount that could be accidentally spent in this way.
If I had an extra $1,000 in my account, I might accidentally spend it, but I could replace it eventually. If I had an extra $50,000 in my account, that would be much harder to replace, but I'm not sure how I could with a straight face say I spent it accidentally.