Eseries / Communicators :: How Long To Wait Before Getting A Refund

I returned my very new Nokia E72 to Nokia in November 2010 with a promise of refund as it would not function as advertised (checks only 2 email accounts out of my 8 and that is a breach of their fitness for purpose clause of the warranty) at any given time. Its almost March and still they have not sent me a refund check they had promised within 8-10 weeks. My frequent followup calls to Nokia Executive resolution / Retention department have always gone un-answered.