Hi Louise,
Thanks for reaching out! It looks like your new plugin purchases with us were made very recently, so we can certainly assist you with refunding those if you’d like to purchase the Importer Bundle instead! You can submit your request using our refund request form right over here, and we’ll take care of the rest. 🙂
Regarding your second question, yes, you can definitely use Event Aggregator in this way to import your Google Calendar events! The 100-per-day limit on the entry-level product tier is for 100 imports, not 100 events–each singular import task can bring in any number of events while still counting as just 1 import.
I hope that helps to address your concerns here! Thanks again, and let us know if you should have any other questions!