I am currently having a dreadful experience with t...

I am currently having a dreadful experience with this company - I ordered an iphone 7 on April 24th, the money was taken from my account within 2 days. Weeks went by and I didn't receive it. Every time I chased I was told it would be with me the following week, but nothing materialised. At the start of June I cancelled my order and requested a full refund, I am still waiting. It is impossible to get through to them on the phone. Every time I email I get a different story about when I will be refunded. I am currently seeking advice as to next steps I can take. I would avoid this company at all costs.