I am sorry that this happened. Though I understand that a T isn't obligated to work for free and maybe it isn't technically abandonment, it seems really cold to me. I'd hope that if I were in such a position my T would at least be a little flexible and override the office policy (which I'm sure the can). To drop a client so suddenly does seem a bit mean to me. I do know it happens at the practice I go to though, so I guess It's not uncommon. True single practice Ts sound like they are less rigid with the financial policies.