Lost my chekced bag

Lost my check bag in a flight exchange between united and Gol airlines in Brazil Newark to GRU são Paulo. Now united sends me to contact Gol, Gol send me to contact united , sends me to contact the airport airport send me to contact united , united sends me.go contact Gol airline and Azul airline only to be stuck in a samsara loop ,and Expedia whom booked through I got insurance for my trip with them won't help me because I didn't buy anything (I can't my cards were in the bags) I have no idea what to do, I have no clothes to change into , no spare shoes , no toiletries luckily a family is having me stay for a while thank their hearts but are sad because erhey can't help me with clothes , what do I do ? The airlines send me back and forth FOR CONTEXT THEY MADE ME pay an Uber through my phone to Uber 2 hours away to another airport where my bag "was" it wasn't there and never went there only to make me take a flight to my final destination BSB Brasília saying it will be there when I land it wasn't so I call the airport last few days asking them if they can check the lost luggage , they send me back to United and it loops , this is my first time flying and I hated it I don't care how good the flight was anymore this is bull **** what am I supposed to do ? I can't even go out because I got 1 pair of clothes IN WEARING IT AND HAVE BEEN SINXE AUGUST 8TH