Customer Credit Card Information Stolen 2.0.3.1

I have several customers saying they are getting fraudulent charges after ordering from my site. How can I make sure that there is no malicious malware on my opencart 2.0.3.1 store stealing credit card information?

Well, if your Customers complain, then, you probably already have some Malware
in your Shop Software. And then, it would be best, to completely remove the existing
Installation, to then re-upload a clean + complete Software again to the Server.

And as long as your Database is not infected as well, it should work again. At least,
until a Hacker finds a Door again. But this highly depends on your technical
knowledge, to make your Site as secure as possible.

But if you're not able, to make sure, you'll have to get professional assistance, and
also invest some money, to implement some security tools into your Site. But there
is no shortcut Solution on such, in contrary, the Web is getting more dangerous,
day by day, so better take it, as it exists, and act accordingly.

Or you will loose the battle, and your Customers too ...
Good Luck!
Ernie

I might have found it. Is livechat.js a normal script to be running?

Well, I told you, what to do. But you probably hope, to find an easy way out,
obviously even unaware of, what's laying around on Code on your Server,
and that's just not gonna work as planned, I guess.
Anyway, good Luck !
Ernie