help or refund?

I'm counting support for months and nobody helps me! They don't answer me, they don't contact me, they throw me from one support to another and nothing is resolved. My cell phone Xiaomi redmi note 9s It doesn't host my worlds for my friends, they can't get in !! I did the test on other devices using my account and everything working normal, only on this cell phone it doesn’t work and no one from the support Help me with that! I am very dissatisfied, I paid for the game and the worlds within it, and I can't enjoy it. Help me !! Please i ask you