Who can help me stop my Instagram from getting hacked after changing my password to a difficult one?

My Instagram account keeps getting hacked. I don’t know who is doing it or why. The location is listed as being in the United States, and other information indicates the exact place. Yesterday, I heard it could be somewhere else. I try to change my password and secure it with my email address, but they keep trying to hack it. When I tried to change my password, it said my old password didn’t match, even though I updated it to a difficult one yesterday. Can someone help me with this problem? It keeps happening.

Even though I tried to delete an old account, it still got hacked. What do I need to do?
Who can help me stop my Instagram from getting hacked after changing my password to a difficult one?
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