Receiveing payments

I have the free service and it says I can only receive 3 payments. Does this mean I can only receive 3 transactions if someone goes to my site to purchase tickets? 

Yes, that is correct.

Payment Submissions - This is the number of submissions that have payment integrations on them. So for example, we have Paypal payment integration on our form, if a user fills out the form, submitted it and successfully completed the payment, then that would be counted as a payment submission.

If you reach this limit, your payment form will be disabled. You can then upgrade your account to increase the limits. More about different account types and limits, you can find on our Pricing page. 

If you do not want to upgrade, you need to wait for the payment submission counter to reset, which will happen on the first day of each month.