I am kinda worried may be there’s lot of rust inside it and one day it’s gonna snap and electrocute somone. Whom should I call to fix it? Sparky ? Welder ?

Also, Its a duplex so should I ask my neighbors to also pay half of whatever I get charged to fix it ?

Some more pics -

https://files.catbox.moe/h5cahr.jpg

https://files.catbox.moe/a38wt0.jpg