Terrible service at Leroy Merlin, no refund received

I went to Leroy Merlin to buy curtains on the 02 December, when I got home the curtains were to long and I took them back to Leroy Merlin for a refund, the total refund was R600 and due to the fact that I have been retrenched from my job, I need this cash paid back to me quite urgently, they advised that the money had to be paid to my card as I had paid with card, I have received refunds from Builders Warehouse in the same manner and my money is always in my account within 4 days so I did not argue with them, it is now Friday, 11 December and the money is still not reflecting in my account, if I try to call them, you stay on the line for ages and the phone does not get answered, I even requested a call back option and 3 days later have not received a call, I will have to now waste my time and petrol driving to the Boksburg store where I bought the goods from to ask for my money to be paid to me. this service is disgusting and I will in future only buy from Builders Warehouse. How can they justify me waiting 7 days plus for my money to be refunded.