Cancelled contract Scheduled under my credit record

<p>I joined this gym in 2013 and was promised a personal trainer, sonar, high quality machines and many more, when I first got there it was an unfinished gym without any changing nor toilets, n no sooner no personal trainer n so stem room, I immediately took our a pen and wrote a letter to cancel the contract only to find out last year i was listed and under scheduling on my credit records with R15780 which makes it difficult to buy a house for my kids</p> <p>Please help me</p>