Terrible experience with refund that was later refused after being accepted

I purchased 2 bathers from cotton on, and a mango one. All were unsuitable due to size. I had purchased from these brands prior and therefore aware of their refund policies regarding swimwear: hygiene sticker and tag attached, refund accepted. My refunds were declined by superbalist. I queried this with the same reasoning as above, the service-person agreed and escalated it for an exception refund. The refund was accepted, however they only included the one bather, and forgot to click the other 2. 2 weeks of back and forth trying to get them to add the other 2 for refund, promises of the refund getting accepted, it was just a waiting game. They finally came back to me 8pm Friday evening to say all refunds rejected. No one has called me back to explain after requesting and calling. They make their own rules that even the brands they sell don’t do. Rather buy straight from the source.