I have been playing this game for a while and I've reached 6300 trophies a few times, I am confident that I can boost you to any amount of trophies you want below 6300.
Challenger League: $4 per 100 trophies
Master League: $6 per 100 trophies
Champion League: $10 per 100 thropies
Telegram: Telegram: Contact @iShowTime
Discord: ShowTime#4952