Hello Ffion-

You can also run collections from the command line using Postman's Newman utility. That will get around the limits. 

There is information here: https://learning.postman.com/docs/collections/using-newman-cli/installing-running-newman/. I've also found Valentin Despa's video tutorials very helpful: https://www.youtube.com/@vdespa/search?query=postman%20newman


Good luck!
Christine