If youre referring to this game, you won.
https://www.chess.com/livechess/game?id=1741297893
You dont know the reason your opponent isnt moving, so dont assume they just abandoned. Maybe this will help explain...
In V2, the game is considered abandoned, even with uninterrupted connection, when no move has been made within 1/2 of the total time control. Increment is irrelevant. For example, in a 10|0 game, the game will be adjudicated as abandoned if at least 5 minutes have elapsed without a move. In a 45|45 game, the threshold is 22'30''.
Normally, this is not a problem, as most people don't devote half of their total time to a single move.
I am reasonably certain that in V3 this will change, but the details are not known yet.
Note that some poor sports of the kind you mentioned may keep a connection without moving, in hope that their opponent will get fed up and abandon the game. I suppose this is what the current implementation is trying to address.
How do I report someone for walking away from a game without resigning. I am ynable to start a new game while the current one is in progress. Have some manners!