TV shop and electrical appliances

I bought TV and it's only work 2 months, and then stop working I call them by 9th December and it took them 2 weeks to give me references number, then after they give me it took them 3 weeks to send a technician and he promise me that he will order Mainbord it took 10 working days, now 10 working days is finished no one is calling me to explain the delay, then yesterday they sent me SMS showing that my references is complete repair which is lies, my references is ***