confused... can you help?

I had researched pay day loans at one point a few weeks ago because I was a bit desperate at the time and behind on some things. However I never agreed to a pay day loan, or accepted a pay day loan, at least not to my knowledge. I just received a deposit into my bank account today from someone that read only GFG_Serv. I've read here on this forum that it is most likely Greenlight Funding Group. I live in Vermont. I do not want and no longer even need this loan. Nor did I agree to receive it to begin with. What should I do? I sent an email to their "support" address. I don't want any part of this "loan". Any advice on how I can rectify this? thanks! :)