Bad refund time

I bought 3 pairs of sunglasses at Falco Milano the service was excellent the gentleman helped me with all my questions tried them on. After 3 days I returned the sunglasses as they gave me migraines and strained my eyes. I told the gentleman my scenario he explained to me that they can only to exchanges. After a while of talking the gentleman phoned the CEO and explained to him what the sunglasses is doing to me and told him that I would like an refund. The gentleman gave me an damages/customer returns receipt and told me he eill be in contact with me it normaly takes 72 hours it has been already 5 days and I haven't heared a single word from them about my refund.