Hard disk not installed - XPS 13 9360 2 months old

Last night I came back to my computer to find a screen that says: Hard disk not installed. Call technicall support (hard to understand the accent of people in India by the way), ran tests for 3 hours; technicians changed due to a change of shift, so I got 2 different people; two different opinions. Last one determined I have 2 options: send the computer to the depot (15 days w/o a computer) or have them send me a new SSD for me to have someone install it. 

What would be better? if I decide to get the SSD, will I lose my warranty since someone else will have to install it?

I see so many posts saying the change of SSD does not help... I am worried.

Will appreciate your input.

Patricia