We'd really need to see what it is you are trying to plug into to be able to tell you for sure.
Can one of your relatives post a picture of the receptacle?
If it's a receptacle that has 1 ground, 1 hot and 1 neutral that's 30amp or above you should be able to get it to work. May want to switch out receptacles though.
I have a 220 50amp in my garage for my ridiculous compressor but it has no neutral (cheap electricians!) so I just ran a new 30amp single pole outlet to my trailer that's dedicated just to it and put the proper TT-30R receptacle on it.