How to Increase API rate limit?

I’m working on a property platform solution that uses data from the Companies House API in real time. The rate constraint of 600 requests every 5 minutes is likely to damage the service and become an issue if the service grows in popularity.
Is there any way to increase the rate limit for the service, because it took to long to getting the proper data to obtain all of the data within the current rate limit? Also, the crone fails many times. Please assist and advise on the best and most appropriate option!

Thanks, Sidra S.
binaryprotagonist (@) gmail DOT com