Dell Malaysia Tech Support & Warranty

My laptop doesn't have a service tag and the support ib Thailand and Malaysia has been pathetic. Its the second Dell computer that has crashed and tech support cannot cannot verify if its covered under warranty. Can't they check this against my delivery address as i don't have the reciept or service tag? The Inspiron N5010 they sold me didn't include a service tag so they refuse to fix it. This is the second laptop i have purchased from them and they fail to honor their agreement to fix the laptop while its under warranty as they didn't include a service tag at the time of purchase. I do NOT have a service tag. The machine did NOT include a service tag when it was delivered. My invoice is copied on my laptop which cannot be turned on. DELL have informed me via email that you can find the service tag via my name and address search which you have failed to do. It is clear to me after more than 20 phone conversations spanning 3 days and 3 countries that you do not want to help me by tracing the service tag using my name and address. I remind you that i travelled for several hours to your Phuket store where your agents told me my laptop doesn't have a service tag attached underneath the computer. They could have connected the machine to an external monitor to boot the system into BIOS and retrieved the service tag. They didn't do this or suggest it even though i told them a copy of the invoice was stored on the hard drive.