¿Limits importing data to Zoho CRM?

¿Limits importing data to Zoho CRM?

Hello, I am new here. I have a big doubt. I'll try to explain it in English (I am a Spanish user).

I have the FREE CRM (we are only 3 people). We make phone calls, so the number of contacts we need is unending.
Up to now, we have imported/exported around 3000 numbers (we have around 600 always online).

Today, making my usual import processus, the following note appeared:

LO LAMENTAMOS, HA LLEGADO AL LÍMITE MÁXIMO DE SU EDICIÓN ACTUAL
Translation: SORRY, YOU REACHED MAXIMUM LIMIT IN YOUR CURRENT EDITION


I thought the onlye limit on free Zoho was 1000 imports/batch. Is there a total limit too?

Thank you.