Stations have Designated Market Area's (DMA) assigned to them. You may actually be in an area covered by NY or some other city, and a competing station is forcing Comcast to drop the out-of-market one. Legally, there is nothing Comcast can do to keep it.
I watched this channel daily.....Where is it? Will it be back?
Apologies, I can see the notice below that was printed on your recent monthly statement :
Xfinity TV Update: On or shortly after June 26th, WPHL (MyNetworkTV) will no
longer be available.
In your area, MyNetworkTV programming can be found on cable channel 19 from WHP-DT2.