5 year plan ??

I am a long time retired military customer and recently tried to keep my $40 per month for 1 year plan but was told by xfinity rep.there were nothing available.  Considering dropping Xfinity and getting local fiber for less than paying now. I am a Diamond member due to my military status and being a very long time customer but don't mind losing that.  I would like a reasonably priced 5 year deal and not have to cancel my account.

Thanks,

Randy  Owen