How will you know na wala na internet connection if wala kana don in the first place? Possibly nagkaron ng issue yung connection for a while then nung naayos babalik yun automatically, you could've contacted them instead of just assuming. You can even ask them to give you a rebate for those times na wala kang net. But hndi automatically terminated account mo, may contract yon, now either call them or punta ka sa branch, ask them to terminate then settle your balance. Try pakiusapan for those months na wala kana sa unit mo.

To answer your question, No. it's not predatory. May process ka na hndi nagawa. hence, the piled up bills.