Hifi Corporation/ HTS Canal Walk failure to pay!

I received a Ptoline laptop from online store, it was advertised as UHD (Ultra High Definition). It wasn't even "HD" never mind "U", I could see the pixelation on the screen. Needless to say it did not suite my business needs the next morning I emailed & called saying I want a refund & returning. They asked if I can take it to my nearest store (which are few & far between). I took in to HTS in Canal Walk mall. Where I dealt with a wonderful assistant, the store is new & he did his best to help me. He liased with head office on the phone. I filled in forms & gave them their product back in original condition & packaging. I was told it would take 5-7 working days to receive a refund as they can't get my money back in store, as I paid eft that is how they would return it. I thought it a little weird as the product was sourced from a store originally, not just some warehouse somewhere... but I was patient.... 8 working days late I receive an email titled credit note with my banking details & value of product, I thought great they transfering my money today......

Today is 12 working days later (17days total) since I handed over their product at HTS Canal walk. I've email again & will call today as this is BS. They currently have my money & their product & impending my business with their games.