Keep badgering your doctor like I did and they might give you something stronger. I'd love to try the laser
treatment or surgery, but I know those methods are only for extreme cases (or the rich kids!)
I actually work in an STI clinic on reception (ironically!), and I can tell you now warts are the least problematic queries I have to deal with. It is a very tame STI with little to no health complications, compared to a lot of the other infections.