Consumer Redressal

Dear Sir/Mam, I own a Toshiba Laptop purchased from Oman, and is under International warranty. Laptop faced a display issue(no output on screen), I reported this to Authorised service centres of Toshiba, it has been 75+ days now and they still haven\'t repaired my laptop nor they are replacing it. Can you please help, what can I do ? Procedure to file a case against them ? I have all the backing documents (and details) + mails exchanged with the service heads of Toshiba. I\'m fed up of their poor service and lost on my working hours of more than 2 months ! and still no improvements from their side.