I am unable to attend online classes

Hey everyone, how are you all? My name is John and I am 29 years old. And I am doing business management from the local college. I visited this site to get a solution to my problem. My problem is that I am unable to take online classes at my college. Our college students have a group in which they use to video call for online classes. But they did not add me to this group. And that is the reason why I am unable to join online classes. I have tried much and even my friends are unable to take the same classes. They all and I are trying our best to take the classes. But no one has sent any kind of link to join online classes. At last, I just want a solution so guys please tell me how can I join online classes.

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