I'm not a bayantel user but pretty sure it internet traffic. Maybe, there's a lot of people using the internet on that day or specific time. If it still persist then contact your service provider to reset your ip.
My connection in house is Bayantel, kahit walang naka connect sa wifi hindi manlang umaabot below 100ms yung ping. Mas okay pa maglaro sa LTE Data Connection sa phone mababa lang ping boset nga eh hahaha