Not able to move to best plan

<p>Today I phoned my medical aid(discovery health) to upgrade to the best hospital plan they got where I get 200% hospital cover. We went througth the whole process(45 minutes on my bill) just so that they can tell me at the end Im not allowed to upgrade to an expensiver plan (the best plan, cost double more what Im paying now). Im only allowed to downgrade to an cheaper plan. Makes no business sense. They would rather let me pay less then paying more. So best decision for me left then, is to cancel my whole plan with discovery health and get an hospital plan at another scheme. So my question is, why so dumb business plans where you would rather loose an client, then to supplying him the bigger demand he is asking?</p>