Help for my dad Kazimierz Lichaj's cremation

Our father passed away on January 10, 2021. Cause of death is still unknown, it is hard for the doctors to figure out what happened to him.  When he was found on his bed, all his money he had saved was stolen and all of his jewelry so we are having a hard time with money to give him a proper goodbye. He always said he wanted to be buried in Poland next to his parents and brother so that will be a big cost for us especially since we are tight with money right now due to the situation. He cannot find peace until we resolve this and find out who stole from him and if someone tried to cause him harm. He was going to be turning 59 this April. Everybody in the neighborhood knew him and he had many friends that cared about him and are wiling to do everything they can to help this situation. Friends and family in Poland are trying to do everything they can as well, but it's hard since they are so far away from us. Anything will be much appreciated so please if you can, help Kazimierz Lichaj find his peace. Much love!