Gomelo shocking service

I booked a stay at Crystal springs thru Gomelo on Friday afternoon. The agent told me I had 24 hours to pay and sent me the link. Saturday morning I clicked on the link to pay at it said it had expired. I tried calling they were closed. I emailed no response. So this morning I called and said can you please reinstate the link as it expired hours before payment was due. They said no sorry someone else had already booked it and they couldn't take it away from them. Yet they could take it away from me. The payment link wasn't working. I tried at 9am on Saturday because I had been told I had until midnight. The manager hasn't called me . So take the booking from me but not the other person. How does that work? Thats not ethical by my standards