So I visited my Stack Overflow account and found this 7-day suspension. Then I checked my Questions Sections and found out question I never asked (It looks like a bug). So does anyone have an idea to fix the bug (And I noticed my Meta Stack Overflow Account Image (and Name) is different from my Stack Overflow Image (and Name))...
The accounts were merged after the following annotation was added by a moderator.
Those two accounts certainly appear to be operated by the same person.
Given this meta question, and blindly assuming that you are being truthful here, it looks like your account and someone else's accounts were merged, that the suspension is a direct cause or result, and that there are shenanigans afoot.
You should have received a message telling you why the account was suspended. The suspension reason alleges voting fraud. It's very likely that something or someone decided that these two accounts belong to the same person (apparently you), and that you were voting on your own posts.
If this is not the case, do you happen to know the person owning the other account? Perhaps a schoolmate, colleague or roommate? If so, that's certainly going to look fishy.
For the suspension, this is the right place to ask for help. A moderator may wander along soon and provide more information.
For the merger, you may wish to contact Stack Exchange directly for assistance. I'm not sure if unmerges are a thing.