Note to self: never, ever, EVER, accept to subscribe anything on the phone, without reading the actual documents. And hang telephone up when they say "we cannot send you the proposal via email or on any permanent document".
I have always stuck to this rule, one time I have disregarded it, now I know better. On the plus side, I now perfectly know how an electricity bill is made (hint: cost of energy is by far the least important bit). Having clients in energy distribution, I knew this fact already, but always good to learn it on your sore skin.