Troubleshooting Find People Feature with Salesforce Accounts

Hi Clay S.. I've created a table with all my accounts imported from Salesforce. From there, I'm wanting to find all relevant contacts within that particular account list. I'm using the "Find people" feature, and when creating a list, I have about 15,000+ people I can add to a table. However when adding to the table, only 50 upload. I've tried doing this process several times and it keeps doing a 50 person max, even after increasing the limit per company, and limit in general. I'm trying to use up so extra credits by end of day, so it's a bit of time sensitive ticket!