Update: I tried all kinds of solutions, but am now using my partner's Surface Pro 4 for work. It works just fine with the same internet connection.
There is no solution and since Microsoft has not bothered responding, I had to wing it at a time when I needed my computer more than ever.
This problem has taught me one thing though, trying to leave the 'Apple-verse' was a mistake. It is worth paying more for that because you cannot put a price tag on efficient and responsive consumer service when you're in a crisis.
Hope the rest of you figured out some sort of solutions. Thank you for the responses.