BlueFernof Knysna -Poor business principles

I booked for 5 days at BlueFern of knysna . We were sailing up on Saturday 16 September and developed gearbox trouble, I had to return to Cape Town on the Saturday . My booking was for Monday 18 September - Thursday 22 September . I cancelled via email on ***. I had no response . Initially I had a no penalty cancellation when I booked. Suddenly it was 100% cancellation fee. I phoned the business on the Monday and told them my predicament . They just said write a letter and they will consider. I had no response from them and only followed up two weeks later. They could have taken 5% or even 10% cancellation fee but not the whole week. I tried to negotiate but Blue fern said I must go through booking.com and booking.com said I must negotiate with Blue Fern. The loss is a whole R2400 . They don't even read my emails because they refer to not having being able to get someone for the Saturday night. I never was going to stay there on a Saturday. It was Monday to Thursday. The records would not have shown anything of saying that they will look into the case because I phoned and spoke to Steve . Pathetic excuses and replies just to ******* clients .