i sent 0 ether to your address but receive back nothing. where can i submit my transaction to receive UAT
there are 2 incoming transaction to the contract in pending, both of them with a low gas price (2 and 5 Gwei)
I think you are stuck by a low gas price, right now the price is higher, safe low at 20 Gwei, have a look here:
https://ethgasstation.info/