You shouldn't be posting your Service Tag number.
Anyway, you'll need to contact Dell.
You will need to provide proof of ownership and not just that you have a Service Tag #.
Thank you for your message. I will be glad to assist you on this.
For my reference, please click on the message tab next to your avatar– click “New Message” & search for my Dell username (Dell-Sreejith R) & send a private message with the registered name & email address.