Pre matured Failure of Samsung Microwave oven

Sir,
I had purchased a microwave oven SAMSUNG TYPE G2739N M/C:G2739N-S/XTL S/N: 7MRY900012B from SINGH ELECTRONICS, KORBA, CHHATTISGARH, at Rs 6800.00 on dated 30:10:2005, as soon as warranty was over in few weeks the heat chamber painting in the base of the oven was erroded and now the metal is corroded. I had contacted samsung service centre, korba in oct 2007, he told me that the problem is irreparable.I asked him that "if your samsung product sustains for only 2 years then what is the use to invest this much amount on it", then they provided me contact no. of a service engineer Mr. Abhijeet. he visited me in feb 2008 and told me that this oven is irrepairable but can be exchanged with another samsung product with about 40% depressiation value. But uptil now no settlement has been done. hoping for your postive responce regarding this issue..
Yours Truly
Mr. M.Rama Rao
Q.No. B - 235, AdarshNagar,
Kusmunda, Korba CG
M.No.: +91-9425537339
E.Mail: rrmuddada@gmail.com