I can't believe that a doctor told you that PVCs cannot make you dizzy. I've got PACs, which are not as significant as PVCs, and they used to make me light-headed. I'm on medication now which controls the PACs. I usually only felt dizzy during exercise when my heart was jumping around like crazy, so I could sort of predict it. I would just stop exercising for a minute and then continue. I never really felt like the world was spinning or anything, though, so this may have more to do with your ear problems. I've had only one epsiode like that, and it was while I was driving. I was driving in my car, very relaxed, and I got this feeling like I was going to pass out. I almost pulled off the road, but then the feeling passed. Maybe 10 seconds or less. The medication I am on lowers my heart rate, so sometimes I think I'm just not getting enough blood to the old noggin.
My advice: try to get an opinion from a different doctor, specifically a cardiologist.
What part of Scotland are you from? We lived in Brechin, Angus for about three years. It's between Dundee and Aberdeen.