Participiants enter other meeting room

[BHA]

Hello.
I've tried to find a solution from Zoom troubleshooting,  but cannot find any. Why it happens regularly - but not each time -  that when participants are using the link I gave them, they enter another meeting room than where I am. Sometimes it helps that I close the meeting and enter with the same link, that they have. However, it doesn't help each time. I do close the meeting from everyone, but still, when I enter with that invitation link, it says I have another meeting on going and should finish with that. This is very frustrating and am wondering how would I pay for Zoom service if this is what happens.

We are hoping to gather once a week  for 30min at this point, but it already breaks for people get tired with this problem. A year ago it occured, and now that we came back, it's about to kill our grop meeting. 

Hoping there is someone out there to hear my cry