Orders a grade a reconditioned iPhone 7. Arrived...

Orders a grade a reconditioned iPhone 7. Arrived and after checking found multiple faults (spot in the camera, faulty backlight meaning the brightness was off, no waterproof seal inside the casing and missing battery screws). Sent it back requesting a refund. The company claimed not to have received it which took around 2 weeks to locate (funnily enough after I d sent the Royal Mail tracking proof and pointed out they can match from the serial number - incidentally looking at the previous reviews an awful lot of orders and returns seem to be lost in space). They ve agreed to refund which takes 14 working days so more than 2 weeks. They re currently 4 working days over this so 6 in reality and still no sign of a refund.
Original order was placed on the 31st July. Signed for return on the 23rd August, we re in October now and still no money back. Avoid!