Can I increase the number of minutes for transcription on the pro plan or buy minutes extra?

Is there any way to increase the number of transcription minutes on the “PRO” plan, or maybe add more plan options?

In my case, I constantly use complex prompts for transcription, utilizing my custom modes, and this eats up a massive amount of tokens. I feel like the current transcription limits on the PRO plan definitely won't be enough for me for a month.

Or is there any option to purchase additional minutes?