Hi HLam36. My name is Ivan, and I am an Independent Assessor.
Contact the sales manager: If you have the contact information for the sales manager where you purchased the computer, you can escalate the issue to him/her. He/she may be able to intervene and resolve the problem. If necessary, go in person (if applicable) and find the sales advisor to answer for what was promised.
It would be best if you continued to insist on contacting Microsoft support, from here unfortunately we will not be able to help you resolve the problem. Sorry