Friend once again check your wallet - on 10th may 2019 - they have paid...its unconfirmed transaction - soon it will be confirmed by bitcoin network

also check this Transaction thy have paid to 25+ users - total 0.0769 BTC

https://www.blockchain.com/btc/address/13kk9wXBJe5DbPHBJXAcqTdDwJTPRU93d3