you surely can but first of all you should figure out while your application got rejected. Jakarta is known for being a friendly embassy so I believe there was a major issues with your application
op is from the uk, if you apply for a TR visa, the embassy will reject your application and keep the fees saying "you got a british passport which allows you to stay 60days visa exempt. No need to apply for a visa"
people don't have issues with anonymous, people have issues with ppl who talk bs. People tend to be more honest and talk less s**t when they put their name and face on social medias....