Homechoices' bad service

I purchased a laptop from homehoice with insurance. After a year the laptop broke and was taken into repairs by homechoices courier. After 2 months I am still waiting for my laptop. They have still been taking their monthly installments from my account. The insurance has taken their access fee as well for the repairs. I am infuriated as I called in numerous times to find out the progress of my laptop and I am still without an answer. Ontop of all this their call centre has been giving me the most stress as their supervisors, team leaders and managers are constantly unavailable. As a result the consultants are of no help and have been sending me up and down between Finchoice and Phonechoice. I Feel extremely frustrated and upset by this. If I don't get a response I will be forced to stop the contract and reverse payments.