Madrasshoppe — Not received refund. No response from agency

Ordered the set of Harry Potter books.
They cancelled the order stating no stock.

I asked for refund, they said payment failed. 1 month over not recieved amount..
Now they mailed saying they shipped the books.
I already brought those books from others. Now asked them to cancel and repay.but ko response. Not even have their contact no. To call.

Very poor and pathetic service. Looks like fraud agency.