nashua machine contract wort R300 000 am dead i need help machine not working

I am writing this as I am desperate for solution 1. we have a contract which we picked that a wrong machine was delivered after 5 years in contract 2. the machine for the past 2 years has been giving us problems 3. technicians have visited with no solution 4. service level manager was advised and promise to visit our office was raised up to date nothing has been done . contact am told for a printer is 300 000 with no paper provided am I buying a car or what pls pls help I need to opt out of this contract less I would have purchased a house with a useless machine . 5. am a small sms 6 I encourage other sms pls read contracts before signing