Samsung Mobile Phone — mobile repair

i m a customer from mangalore, karnataka.my mobile phone samsung sgh-j210 which was bought on 25th may, 2008 suddenly was heating up and wasnt gettin charged few days back...when i gave 2 the nearest authorised samsung service centre they are simply delaying the repair...its been around 20 days since i have given 4 repair n stil they havent repaired it... so please help me because its causin a lot of inconvenience and they are not ready 2 give a spare handset 4 temporary purpose...