MSI — Repair times and communication

My laptop was picked up by the courier 2 weeks and 6 days ago as of time of writing with a simple memory problem that I was able to diagnose at home despite not having any experience in IT. I have received contradictory information about the stage of my laptop's repair for the entire duration of this RMA. Initially I was told this repair would take between 2-3 weeks. Whilst paying for part of my laptop repair earlier this week, I was told that I could expect my laptop back midway through the week of December 7th. However, my online RMA repair tracking service (which has only been updated once: today) now says that my laptop can be expected back on the 16th of December. I am a university student and thus will have been without my laptop for 5 weeks (as opposed to the 2-3 I was initially quoted); making it incredibly difficult to continue my online studies especially without a courtesy laptop. Please can you give me an accurate date as to when I can expect my laptop back, and please hurry it along. I find it incredibly unprofessional for a customer to told multiple pieces of contradictory information, and for a repair on this scale to take over a month, despite coronavirus restrictions.