Refund on order

I ordered the 11th of June. I received a confirmation mail and paygate also send a mail. The morning of the 14th of June I called Leroy Merlin and after holding quite a while, I was told that my order wasn't processed yet because they didn't pick up my payment, but it wil be sorted and escalated to the person who works with online orders. That afternoon I received a mail that my order was cancelled, due to me not paying in time. But I have the paygate proof that I paid the 11th, when I ordered. When I called again on the 15th, I was told that the order was canceled because they don't have stock, I was given a choice of waiting for stock or refund, but also that a refund could take up to 30 days. But they would get bacj to me. Of course nobody got back to me as yet, and it seems that these people are con artists and *****ing money from orders.