No payment from a sold item?

[SIN Darkfold]

Hello, I have created a store recently and I have seen in my email that I have sold 2 items, but I have not got any payment, and it does not show in my Transaction History or ever showed up in-world. I do not have a Premium Account, I would appreciate info from forums. Please productive answers.

[Rolig Loon]

I assume that you mean you created a Marketplace store, not a store in world.  If that's the case, submit a support case to Linden Lab, using the category Marketplace Issues.  That's the quickest, most reliable way to find out what happened.