I haven't been in contract w custom built since 20...

I haven't been in contract w custom built since 2013 now I have over $2000 on my credit history saying I owe the company money!!!! How horrible. I discontinued my contract with this company and my trainer due to change of employment and move out of state. Custom built wanted proof and requested for my chief to submit a written letter to the custom built which was also completed they still apperently sent it to collections instead of dismissing the contract!! I highly highly recommend signing nothing with this company. Over $2000 worth of sessions they are trying to say I owe! They don't care what their own contract says! And your word or proof mean nothing!