Sounds like the router needs to be reset... did you try that? It sounds like it has run out of IP addresses to lease, which a reboot should solve.
You might want to request to the landlord that they get a better router that is meant for more users than your average home router.
I live in Grenada. Requesting a better router is a loooong shot haha. I am most definitely willing to donate a router to her. She has been fantastic during my studies here. But on to the resetting of the router...
I have already turned it off and on. What other way should I reset it? Do I need to ask my landlady for direct access to the router then?
Thanks so much for taking the time to read about my problem.