Can I change which city I want to advertise in with my VIP profile?

Yes, you can change the city of your VIP profile at any time. However, it is important to know that you cannot change the location to a country above the category of the country you chose when purchasing the VIP profile, only to a country with a lower category. So if you want to switch from a higher category country to a lower category one, you can do that but not the other way round.