Regarding issue not resolved

I have an Inspiron 3583 model that I purchased last year on 12th June 2019 and its been two weeks since it hasn’t been working. . I’ve called Dell multiple times. I had also extended my warranty at the time of purchase under the back to college offer. Now, when my laptop isn’t even turning on, I called them for help. They said that they can’t see any extended warranty and I should talk to the department that handles this. I talked to that department and they asked me to send the invoice and the proof of warranty extension. I called them after two days since I got no response. They said that it takes 5 business days. I called them on the 6th day and they said that there still isn’t showing any extended warranty. They tell me to wait while they connect me to the right department but every time the call disconnects itself. I have my exams going on and to manage this amidst a pandemic is very frustrating when all I’ve been doing is having myself held up on their toll free number for hours. I’ll be really obliged if an action can be taken in this regard asap.