I have bought a white bikini which has acouple of faint dark ink spots which i photographed and showed the seller. I won item on bids for £2.75. The sellers offered me a 50p refund which i refused. They then contacted me again telling me to buy a new bikini and offering me a discount and the 50p because it wouldn’t be worth me sending it back because it would cost me more than i paid for the item. Not sure what to do really?