Revolting customer service

A few weeks back I phoned and asked for a life cover quotation and was quoted just under R800 and I agreed to quote . Then blood test were done and further info was requested from my doc and that was submitted. Then it was requested that I send a letter confirming I smoke or drink canibbas once or twice a year as I stated in my questioner . I was told that's all they need every other thing was in order then i questioned the cannibas letter on why do they want a confirmation on something that legalise please can they explain because I couldnt understand why it's not requested for alchohol but cannibas which has just been legalise I hv to write a letter and truth be told they both have their own after effects. Instead of getting feed on the reasons why I get slapped with a require that's over a R1000 and no explanation why the require so basically if you ask questions you get no answers but a requote. So I should just do want you ask or you'll charge extra because you make your own rules and dont have to explain anything , is this how discovery does their business. You basically rejecting me by accepting me with a higher quote. Wow, so petty for such a big corporation.