The sale guru I ordered a product and they never sent the item. Then told me I would have a refund in 7-15 business days and have not received it. This started in August 2017 Internet

I purchased 2 in 1 curling iron online. Paid $49.97 For it on August 21,2017. Had not received it by end of September so I began emailing them. I received email back stating that there was a high demand and because of hurricane weather they were not able to get them from over seas or something to that effect. I then told them I wanted a refund and was told that they were sending the item after all. I told them I wanted a refund because I had gone online and seen that others ordered around the same time and had not received theirs either. I then received an email out of the blue from them stating that my card would be credited within 7-15 business days. I received that December 8th and have yet to see the credit in my account. Now I am getting email returns stating that their email server is rejecting my emails. Also, the website says it is not available. The other website that comes up with thesaleguru.com is shopify.com. I have all the emails between all of us.