Sony Rdr GXD360 DVD Recorder

i purchased one in nov in feb it went back for software up grade it broke in april which was replaced that broke in july another new one then three days same old problem. this dvd does not like channel 5 it just chops of the start or the middle or the end of programs have tryed to talk or e-mail sony a waste of time no one knows a thing about a problem. this dvd is best left alone if you record chennel 5