Sony Ericssion C510 — replacement for sony ericssion c510

Respected sir
regarding my mobile i parchased 19-6-09 and i get the prob. on 21-6-09 then i sumited to the servies center of sony ericssion onn 22-6-09. but service center create my job sit on 23-6-09 com.no.se[protected] and my complain is solue at 24-6-09 in his record but realy my mobli is not working proparly today also the prob. is same and for that i complain in complain center of sony [protected] comp.no.SE[protected] and after that no solution geting i complain it to email of sony questions.[protected]@support.sonyericsson.com two time and geting online comp.no."Case : 73578194" but still today 02-07-09 i dont geting any solution or reply form sony