We do not automatically increase your contact limit. You'll need to move your account limit up manually. An alert will display in your account when you approach your limit. A red indicator will appear in the bottom left-hand corner of your account near your user avatar.
To manually update your contact limit:
1. Click your name located on the bottom left of your screen and click "Billing & Upgrade"
2. Select your desired contact limit using the sliding scale
3. Under Payment, click “Update”
For more information on how to change your plan, please see this help article.