Still waiting for my refund after a month.

I bought a chair from Marko via there website. The chairs seams started to come apart after 4 or 5 months. I returned it to there closest store as per the return policy on the site. The process seemed simple as they checked the chair and said I would need to come back as they will need to assess it. A week later I received a call to say I would be refunded. I went into the store where they processed the refund and told me it would be back in my account in 24 hours. <br> <br> After not receiving the refund I called them and even sent them the refund slip. They then requested more and more information from me and often the same information over and over. more than a month later I still have not received a refund and they still asking me for information. The last excuse is the lady went on leave and didn't know I was not refunded. She is the 4th person I have dealt with. I have provided the print out of my purchases from there own website, I don't understand why this is such a difficult process when it is all on there online shopping system.