Good service until you want to return an item

I purchased a night vision from Blades and Trigger more than a month ago, at first the wrong unit came, and informed the salesperson and with hardly no effort the correct one arrive, until this point I had good service, but then…. I was not happy with the product and ask if I can return it for a refund the very next day, I waited a few days for the answer phoning every day, and hot the “Yes but I will have to pay 10% Handling fee) I accept and return the unit the same day they gave me the go ahead. The unit was delivered to them on 24-Jan 2024, after about a week they say it takes 5-7 days for a refund to process, ok, its now more than 14 working days, still no refund, and I’m losing a hefty 10% and it’s a lot on a high amount, I even paid the courier to return the product. I always got good service when buying, I can wish customers good luck when sending something back for a refund even if it was approved.