Very poor service and regret working with you

Poor service I enrolled with IQ. How ever 4 months later I lost my job I contacted them to let them know that I am currently unemployed and I would like to cancel my course however their consultant told me it was impossible to cancel I ask hance I said I won't be able to pay I'm no longer working, few months later they called and i told them that i am still not working to my suprise earlier this month i got a call from Dubt collecter that loan has been allocated to them. How I tried cancelling and this is educational my choice of learning how can they do such.now I was on an interview was told my credit score was affected by you selling our information to creditors