Ah shame mate, sorry to hear that. Know what you mean with poor A levels though, im a good student but i went through a load of depression and personal problems when in 6th form and lost the motivation to study so got crap grades. Ended up going to heriot watt for 2 years, got good grades when my mood changed and now been accepted to Edinburgh University straight in to 3rd year. Doing pharmacology :P I dont see why everyone always says its a bad degree to do, its a difficult science and there are jobs in pharmaceutical companies researching drugs. personally i think thats a rewarding job to help advance medicine, id rather do that then just give out prescriptions to people in a pharmacy in boots.
No idea how to transfere to pharmacy myself sorry, but you never know, you may enjoy your course. Work hard and get good grades this time around.